Intrapartum Mortality Research Articles

Uterine and fetal asphyxia monitoring in parturient sows treated with oxytocin

Oxytocin is used to induce and control parturition, nevertheless, the increase of uterine contractions decreases blood flow and gaseous exchange through the womb predisposing to intra-partum mortality. The objective of the present study was to evaluate the effect of oxytocin on myometrial activity, fetal intrauterine hypoxia and postnatal asphyxia in sows during farrowing. Hybrid ( n = 120) sows approaching the time of farrowing were randomly assigned in two groups of 60 animals each. Group I (G 1: control) was treated IM with saline solution and Group II (G 2) was injected IM with oxytocin (1 IU/6 kg LW) as a single dose at birth of the first piglet. Both average number of myometrial contractions and intensity in G 2 were greater ( P < 0.01) as compared with G 1. The mean of intra-partum stillbirths (IPS's) and those where fetal cardiac frequency (FCF) or heart beats, could not be detected after birth, were greater ( P < 0.01) in G 2 as compared with G 1. The average decelerations of FCF known as dips II, which indicate severe hypoxia, was greater in G 2 ( P < 0.01) as compared with that of G 1. There was a greater ( P < 0.01) number of intra-partum stillbirths, stained with severe meconium in G 2 when compared with G 1. Oxytocin treatment increased ( P < 0.01) the number of pigs born alive with ruptured umbilical cords and those with different grades of meconium staining on their skin. It was concluded that administration of oxytocin at the onset of parturition increased the myometrial activity, decreased fetal cardiac frequency, predisposed the rupture of umbilical cords and the degree of meconium staining, and increased intra-partum mortality.

Use of oxytocin in penned sows and its effect on fetal intra-partum asphyxia

The objective of the present study was to evaluate in penned sows the effect of two commercial oxytocin products on umbilical cord pathology, degree of asphyxia and intra-partum mortality. This study included 120 sows divided in three groups of 40 animals with eight animals for parities one to five per subgroup, respectively. Group 1 (G 1) or control received saline solution while oxytocin groups (G 2) and (G 3) were injected at the onset of fetal expulsion with two oxytocin products. The doses of oxytocin were as follow: Primiparous sows weighing less than 130 kg received 20 IU; multiparous sows weighing 130–180 kg received 30 IU, and those above 250 kg, 40 IU. Piglets born alive and/or dead were classified at birth using a subjective scale based on the degree of meconium staining on skin. Umbilical cords of intra-partum stillbirths (IPS) were classified as adhered or ruptured and subdivided into four categories: without pathological changes, edematous, congested and hemorrhagic. Result analyses revealed significant differences ( P<0.01) between groups 1 and 2, and 1 and 3 regarding the following traits: expulsion interval (min) (X: G 1 27.7; G 2 22.6; G 3 22.2), IPS with a severe stain degree (X: G 1 0.10; G 2 0.45; G 3 0.50), IPS with ruptured umbilical cords (X: G 1 0.07; G 2 0.42; G 3 0.47), and detectable heartbeats in IPS (X: G 1 0.27; G 2 0.25; G 3 0.22). Treatment with oxytocin reduced the duration of the expulsion of the fetus, increased the number of IPS with ruptured umbilical cords and with severe meconium-stain degree and reduced the number of fetuses with inspiration attempts. Furthermore, the use of this hormone increased the need for obstetric assistance due to increased frequency of dystocia.

Fetal distress

The term ‘fetal distress’ should be replaced by ‘suspected fetal compromise’ because the diagnosis of ‘fetal distress’ is often unproven. Cardiotocography remains the cornerstone of making the diagnosis, but as a test it is renowned for its high sensitivity and low specificity. It has reduced intrapartum fetal mortality but not long-term neonatal morbidity or the incidence of cerebral palsy. There is no doubt that when obvious signs of fetal compromise, such as late decelerations in the presence of intrauterine growth retardation and oligohydramnios, are present, the diagnosis of fetal compromise is relatively simple. Often, however, the subtle signs of fetal compromise are missed; these are a change in the grade of meconium in the amniotic fluid, a rising base-line fetal heart rate, the absence of accelerations, the presence of ‘atypical’ variable decelerations or a combination of the above. To date, there is no test available to replace the cardiotocograph, although fetal pulse oximetry is the most promising adjunctive test. Above all, no test result obtained in isolation must detract from the whole clinical picture.

The cost-effectiveness of home birth

As health care costs increase and a growing number of women are without insurance, the one health service that every family needs deserves further attention. Even for the 40% of births covered by Medicaid, safe birthing alternatives that permit a reduction in the $150 billion Medicaid burden would allow the United States to devote more resources to other urgent priorities. Informed birthing decisions cannot be made without information on costs, success rates, and any necessary tradeoffs between the two. This article provides the relevant information for hospital, home, and birth center births. The average uncomplicated vaginal birth costs 68% less in a home than in a hospital, and births initiated in the home offer a lower combined rate of intrapartum and neonatal mortality and a lower incidence of cesarean delivery.

Meconium stained amniotic fluid in very low risk pregnancies at term gestation

Objective: To determine the prevalence and clinical significance of meconium stained amniotic fluid (MSAF) in a low risk population at term gestation and to investigate whether MSAF is a predictor for intrapartum and neonatal morbidity. Methods: A very low risk population including 37 085 consecutive deliveries at term composed the study population. A cross-sectional study was conducted and two groups of patients were identified according to the presence ( n=6164) or absence ( n=30 921) of meconium in the amniotic fluid at delivery and the outcomes of the two groups compared. Results: The prevalence of MSAF was 16.6%. The incidence of cesarean section (5.6% vs 2.3% P<0.01), instrumental deliveries (3.2% vs 1.8% P<0.01), fetal distress (6.5% vs. 2.1% P<0.01), clinical chorioamnionitis (0.2% vs. 0.1% P<0.01), post-partum infection (0.5% vs. 0.2% P<0.01), 1-minute Apgar score <3 (1.9% vs. 1.1% P<0.01), small for gestational age (7.4% vs. 6.4% P<0.01). was significantly higher in the MSAF compared with the clear amniotic fluid group. Intrapartum and neonatal mortality in this low risk population was significantly higher in the MSAF group (1.7/1000) compared with women with clear AF (0.3/1000). Conclusions: MSAF in a low risk population at term gestation is a predictor for adverse perinatal outcome and peripartum complications.

The BirthPlace collaborative practice model: results from the San Diego Birth Center Study

Objective: The search for quality, cost-effective health care programs in the United States is now a major focus in the era of health care reform. New programs need to be evaluated as alternatives are developed in the health care system. The BirthPlace program provides comprehensive perinatal services with certified nurse-midwives and obstetricians working together in an integrated collaborative practice serving a primarily low-income population. Low-risk women are delivered by nurse-midwives in a freestanding birth center (The BirthPlace), which is one component of a larger integrated health network. All others are delivered by team obstetricians at the affiliated tertiary hospital. Wellness, preventive measures, early intervention, and family involvement are emphasized. The San Diego Birth Center Study is a 4-year research project funded by the U.S. Federal Agency for Health Care Policy and Research (#R01-HS07161) to evaluate this program. The National Birth Center Study (NEJM, 1989; 321(26): 1801–11) described the advantages and safety of freestanding birth centers. However, a prospective cohort study with a concurrent comparison group of comparable risk had not been conducted on a collaborative practice-freestanding birth center model to address questions of safety, cost, and patient satisfaction. Methods: The specific aims of this study are to compare this collaborative practice model to the traditional model of perinatal health care (physician providers and hospital delivery). A prospective cohort study comparing these two health care models was conducted with a final expected sample size of approximately 2,000 birth center and 1,350 traditional care subjects. Women were recruited from both the birth center and traditional care programs (private physicians offices and hospital based clinics) at the beginning of prenatal care and followed through the end of the perinatal period. Prenatal, intrapartum, postpartum and infant morbidity and mortality are being compared along with cost-effectiveness and acceptance of the model by patients. Data collection occurred primarily through medical record abstraction with the addition of two patient questionnaires. Comparability of the cohorts was established by using a validated methodology to determine medical/perinatal risk and birth center eligibility, which included assessment by two CNMs and an independent blind review by a perinatologist. The cost analysis uses a resource-utilization approach and new methodologies such as activity-based-costing to compare costs from both the perspective of the payor and the health care provider. Patient satisfaction was measured using a self-administered patient questionnaire. Results: Current preliminary results from approximately 38% of the final expected study sample are available. Crude and adjusted analysis have been conducted. Overall, the preliminary results suggest similar morbidity and mortality in the two groups. Fetal deaths are 0.75% in the index and 0.64% in the comparison group, with early neonatal deaths at 0.26% and 0.23%, respectively. The traditional care group showed adjusted rate differences of 5.83% more major maternal intrapartum complications and 9% more NICU admissions. While the birth center group showed adjusted rate differences of 5.5% more low birth weight and 0.95% more preterm birth. For other outcomes, the birth center group showed an adjusted rate difference of 22.34% more exclusive breastfeeding at discharge. Also, there was less utilization of cesarean section and assisted delivery in the birth center group as compared to the traditional care group. The adjusted rate difference for normal spontaneous vaginal deliveries in nulliparas was 10.23% more in the birth center group, with similar results in multiparas with and without history of cesarean (28.88% and 7.84%, respectively). Preliminary results also show that the average total cost for pregnancy-related services paid by California Medicaid was $4,550 for the birth center and $5,535 for the traditional care group. Final results based on the full study sample (full data available February 1998) details of payor costs such as provider, facility, NICU, and ancillary along with costs from the health care system perspective and patient satisfaction results will be presented. Conclusion: Current results suggest similar morbidity and mortality between the birth center program and traditional care groups, with less resource utilization translating to lower costs in the collaborative practice model. Results suggest that collaborative practice using a freestanding birth center as an adjunct to an integrated perinatal health care system may provide a quality, lower-cost alternative for the provision of perinatal services.

Perinatal mortality and route of delivery in term breech presentations.

To compare intrapartum related infant mortality in term (> 34 weeks) breech presentations in relation to vaginal delivery or delivery by caesarean section. Register based nationwide study. Sweden from 1991 to 1992. 6542 singleton fetuses born in the breech presentation. Intrapartum and early neonatal deaths, stillbirths and congenital malformations, low Apgar score < 7 at 5 min, mode of delivery. After exclusion of antepartum stillbirths and congenital malformation, the intrapartum and early neonatal mortality rate was 2/2248 (0.09%) in the group delivered vaginally and 2/4029 (0.05%) in the group delivered by caesarean section. The relative risk was 1.81 (95% CI 0.26-12.84). Thus the difference was not statistically significant. This result was further supported after reviewing individual cases. The intrapartum related mortality in the group delivered vaginally was low and the result could not verify an increased mortality in term breech presentations delivered vaginally compared with those delivered by caesarean section.

Preterm singleton breech in North Jordan: vaginal versus abdominal delivery.

The safety of vaginal birth for singleton preterm breech has not often been addressed before. We retrospectively compared the perinatal outcome of two groups of preterm breech delivery. Sixty-six patients delivered vaginally and 32 delivered abdominally between 26 and 36 completed weeks. Vaginal delivery was allowed under the same protocol for singleton breech delivery at term. Both groups had similar maternal characteristics. Intergroup differences in early neonatal outcome, as measured by Apgar score, were not significant. Intrapartum and early neonatal deaths in vaginal and cesarean delivery were compared. There was no significant difference in intrapartum death and early neonatal mortality between those who delivered vaginally and those who delivered by cesarean section (16.6 vs. 15.6%). So even with optimum neonatal care facilities, cesarean section does not offer any advantage over vaginal delivery in a developing country. This study does not advocate the routine use of cesarean section for delivering preterm breech fetuses.

Comments on past and present situation of intensive monitoring of the fetus during labor

Modern intensive monitoring of the fetus during labor affords the opportunity for the greatest possible safety to the infant, whilst at the same time dispensing with unnecessary operations to terminate labor which can be dangerous for the mother and her child. Developments over the past 28 years, since cardiotocography has been in clinical use, have unfortunately also been accompanied by confusion and mistakes. We think that there are two main reasons for this: I. Many who use cardiotocography have not assessed its efficiency correctly. Heart rate pattern with all their variations have too often been regarded as the only diagnostic criteria for the determination of fetal hypoxia. However this procedure only allows a rough selection of actually endangered fetuses. In more than 50% of the cases with a suspicious or pathologic cardiotocogram there is no concrete clinical evidence of manifest danger of hypoxia. II. Investigations concerning the practical importance of monitoring the fetus during labor were often not based on actual clinical indications. Attempts were made to prove that continuous electronic monitoring of the fetal heart rate could be replaced by simple traditional auscultation. Furthermore due to failure to appreciate the real efficiency of cardiotocography, this truly excellent method was in fact blamed for the faults arising from wrong interpretation, instead of underlining the lack of logic of the investigators concerned. After all, several prospective studies, that have examined the efficiency of various monitoring strategies, demonstrate the shortcomings of these techniques in the clinical setting and have shown them to have no relevance in every practice. Presently the most suitable way to monitor the fetus during labor is to combine cardiotocography with a biochemical method. At the moment fetal blood analysis is the most suitable test to be performed in cases where the cardiotocogram is not normal. Then the role of fetal blood analysis is to find out whether in fact a danger of hypoxia is threatened or not. Today the most urgent task when monitoring the fetus during labor is not so much to reduce the number of cases of cerebral palsy since these are seldom caused by intrapartum asphyxia. The major objective is now recognised to be to prevent early morbidity of the fetus, newborn, and the consequences that flow from this. The excellent results of combined intensive monitoring of the fetus during labor are particularly well illustrated by the intrapartum mortality in our hospital during different periods when monitoring practice has been progressively and methodically improved by stages. During the period when monitoring consisted of simple auscultation used on its own, the intrapartum mortality was 0.56%. After the introduction of fetal blood analysis--at that time cardiotocography did not yet exist--the mortality sank to 0.32%. During the first ten years of cardiotocography combined with fetal blood analysis the mortality reduced further to 0.17%, and during the following 13 years it reached to a minimal level of 0.4%. Finally, in this review, other aspects are commented on such as oximetry. Oximetry, presently used as pulse oximetry, as an additional biochemical method will possibly be incorporated as the third method of monitoring the fetus during labor. Oximetry could also be used as an automatic alarm system in the labor ward when fetal O2 levels drop below a particular limit to draw the attention of the staff to the case concerned. Up to now this has not been convincingly achieved with the use of cardiotocography.

Outcomes of 11,788 planned home births attended by certified nurse-midwives A retrospective descriptive study

This study describes the outcomes of 11,788 planned home births attended by certified nurse-midwives (CNMs) from 1987 to 1991: A retrospective survey was used to obtain information about the outcomes of intended home birth, including hospital transfers, as well as practice protocols, risk screening, and emergency preparedness. Ninety nurse-midwifery home birth practices provided data for this report (66.2% of identified nurse-midwifery) home birth practices). It is estimated that 60–70% of all CNM-attended home births reported in national statistics data during this period were represented in this survey. The overall perinatal mortality was 4.2 per 1,000, including known third-trimester fetal demises. There were no maternal deaths. The intrapartum and neonatal mortality for those intending home birth at the onset of labor was 2 per 1,000; the overall neonatal mortality rate for this group was 1.3 per 1,000. When deaths associated with congenital anomalies were excluded, the intrapartum and neonatal mortality rate was 0.9 per 1,000; the neonatal mortality was 0.2 per 1,000. The overall transfer rate, including antepartum referrals, was 15.9%. The intrapartium transfer rate for those intending home birth at the onset of labor was 8%. Most responding nurse-midwives used standard risk-assessment criteria, only delivered low-risk women at home, and were prepared with emergency equipment necessary for immediate neonatal resuscitation or maternal emergencies. This study supports previous research indicating that planned home birth with qualified care providers can be a safe alternative for healthy lower risk women.

Breech presentation in Spain, 1992: a collaborative study

Objectives: The goals of the present work were to study the incidence of breech deliveries in Spain, the causes for breech presentation and its management and the incidence of cesarean sections and its correlation with the perinatal mortality rates among different centers. Study design: Data from 102 038 deliveries, 3829 of which were singleton breech deliveries attended in 1992, were obtained from 40 hospital centers located in different autonomic communities of Spain and analyzed using a computer statistical package (R-sigma, Horus Hardware). Results: The incidence of breech deliveries was 3.8%, although this proportion varied between different centers and regions. Up to 18% of the cases occurred in preterm. The most frequent causes were prematurity and uterine malformations. In its management, an increase in the tendency to perform elective cesarean section was noticed. The incidence of cesarean sections reached 14.9% of the total and 67.9% in breech deliveries. Perinatal mortality rate in breech deliveries was more than four times that of all deliveries, according to national standards, and more than three times according to international standards (47.8 versus 11.8 × 1000, and 24.7 versus 8 × 1000, respectively). The intrapartum and neonatal mortality in breech deliveries was 13 × 1000. No correlation between incidence of cesarean sections and perinatal mortality rates was found. Primiparity, deflexed head, macrosomia and prematurity were the most decisive parameters to indicate a cesarean section. Neither the external cephalic version nor the total breech extraction were common procedures. Conclusions: The incidence of breech deliveries is variable between different centers (1.7%–5.1%) and Spanish regions (3.3%–4.3%), with a mean of 3.8% in overall and 11.4% in preterm deliveries. There is a tendency to perform cesarean sections, especially in primiparae. There is no correlation between the percentage of cesarean sections in each center and the perinatal mortality rate. External cephalic version and total breech extraction were uncommon procedures.

Preterm breech delivery in a developing country

OBJECTIVES: To determine if cesarean section offers any advantage over vaginal delivery for a preterm breech fetus in a developing country. METHODS: A retrospective analysis from hospital records was done at a tertiary care center in North India. Two hundred and twenty-four preterm breech deliveries (28–36 completed weeks) between January 1988 and December 1991 from a total of 13 149 deliveries at the hospital during this period formed the study group. Fetal death and lethal congenital malformations diagnosed antepartum were excluded. Intrapartum and neonatal morbidity and mortality in vaginal versus cesarean deliveries were the main outcome measures. RESULTS: Although the combined intrapartum and neonatal mortality was significantly higher for vaginal delivery (35.9% vs. 17.7%), there was no significant difference when the data was correlated with birthweight or gestational age. The neonatal morbidity was also similar in both these groups. In women with a poor obstetric history, the neonatal survival was better in the cesarean group (93% vs. 43%; P = 0.0004). CONCLUSION: Even with optimum neonatal care facilities, cesarean section does not offer any advantage over vaginal delivery for a preterm breech fetus in a developing country. The present study does not advocate the routine use of cesarean section for this group of fetuses. However, it is the preferred route of delivery for women with a poor obstetric history.

Value of Perinatal Audit in Obstetric Care in the Developing World: A Ten-Year Experience of the Maputo Model

A decade of perinatal audit in the Maputo Central Hospital is reviewed with the objective of addressing the potential value of the audit process in monitoring the different constituents of morbidity and mortality in the perinatal period. The perinatal mortality showed a significant but transient change during the observation period 1982-1991, while intrapartum fetal mortality was significantly reduced from 10.9 to 3.9 per thousand (p < 0.0005). Staff members were sensitized towards immediate and long-term effects of implemented surveillance routines by regular feedback of perinatal data on visible wall charts and by weekly conferences. The advantages of a comprehensive audit approach in perinatal medicine comprising both maternal and fetal/infant aspect are underscored. An ethical commitment to nonconfidential straight-forwardness and open-mindedness in critical discussions regarding mismanagement is emphasized for a successful audit strategy.

The Epidemiology of Perinatal Mortality in Multiple Births

The epidemiology of perinatal mortality in multiple pregnancies was investigated from data on 16,831 multiple births from New York City's computerized vital records for 1978-1984. Twins had a sixfold higher rate of neonatal death and a threefold higher rate of fetal death during labor than had singleton infants. Much of this excess mortality can be explained by the lower birthweight distribution in twins: between 1,001 and 2,500 grams twins had birthweight-specific death rates equivalent to or substantially less than singletons. However, in infants of normal birthweights, twins had more than three times the mortality risk of singletons. For twins in vertex presentation between 1,001 and 3,000 grams, cesarean section did not appreciably reduce neonatal mortality risk. For twins in vertex presentation who weighted more than 3,000 grams the neonatal mortality rate was more than four times higher in vaginal deliveries than in cesarean sections (exact p = 0.034). Efforts to prevent intrapartum and neonatal mortality in multiple births should aim at reducing the incidence of low birthweight twins. More research is needed on the etiology of perinatal problems in normal birthweight twins (greater than or equal to 2,501 grams), especially on the effects of different modes of delivery.

Factors Associated with Neonatal Problems in Twin Gestations

We examined the neonatal outcome of 644 twins weighing 500 g or more and 656 singletons, born in the years 1984-1986 in the Soroka Medical Center, Beer-Sheva, Israel. There was nearly a four-fold risk of antepartum death in twins vs singletons, which disappeared when birth weight was controlled for. The risks for intrapartum and early neonatal mortality were not raised in this population. A statistically significant relative risk for congenital heart malformations in twins vs singletons remained (RR = 5.0, 95% CI = 1.5-16.3), after controlling for maternal age. Significantly higher rates of hyalin membrane disease, hypoglycemia, hyperbilirubinemia, anemia and septicemia were found in twins. Controlling for the confounding of the association between twinning and mortality or morbidity caused by differences in distributions of mode of delivery or gestational age between twins and singletons, was not as efficient as the controlling for birth weight. Thus, adjustment for birth weight removed all the excess risks detected except in hypoglycemia. Our findings suggest that the lower birth weight of twins, which is so intimately associated with multiple gestations, is probably the single most important factor associated with neonatal problems found in twin births.

A case‐control study of the effects of birth by caesarean section on intrapartum and neonatal mortality among twins weighing 1500–2499 g

The aim of this nationally-based, matched case-control study was to assess the impact of birth by caesarean section on intrapartum, and neonatal mortality among twins weighing 1500-2499 g, born in Sweden between 1973 and 1983. By using data held at the National Medical Birth Registry, Stockholm, 91 such pregnancies (study cases) where one or both twins died were identified. For each case, two controls (in all 182 pregnancies) were allotted at random from the rest of the twin pregnancies, with similar birthweight (+/- 100 g) and year of delivery (+/- 1 year). The number of twins that died was reduced from 73 during the first four years to 22 between 1977 and 1980, and to 6 during the last 3 years of the study period. Almost a quarter (23.1%) had a lethal malformation. The caesarean section rate increased during the study period, but did not differ between cases and controls (chi 2 = 1.0; P greater than 0.05). The analysis could not confirm a significant difference between cases and controls regarding the number of infants born vaginally in non-vertex presentation (chi 2 = 0.1; P greater than 0.05). The results of this study appear to indicate that birth by caesarean section was not a major factor related to the improved fetal outcome.

Intraparturn and Neonatal Mortality in a Traditional Indigenous Community in Rural Guatemala

We identified high rates of intrapartum and neonatal mortality among children born in a traditional indigenous community in rural Guatemala. To examine the potential association of maternal characteristics and obstetric and newborn care practices with this mortality, we conducted a retrospective case-control study. Case were infants born in 1986 and 1987 who died during birth or in the first month of life, as identified by civil records; for each case, the next child born who survived the first month of life was selected as control. In interviews with mothers of cases and controls standardized data were collected on demographic and socioeconomic characteristics of the mother, her general obstetric history, history of the pregnancy, labor, and delivery, condition and care of the infant at birth, and morbidity and treatments of the infant after birth. Sixty-one cases and their controls were included in the study. Based on clinical condition at birth, we subcategorized cases into infants stillborn or dying in the first 24 hours of life (intrapartum cases) and those dying in the first month after day 1 (neonatal cases). Factors significantly associated with both subcategories of cases were maternal illiteracy, primagravity, failure to use "modern" prenatal care, and inter-birth interval less than 14 months. Intramuscular injection of oxytocin by the midwife during labor, and performance of greater than or equal to 3 vaginal examinations by the midwife were each significantly associated only with the intrapartum subcategory of cases. Mother's estimate of infant size as "smaller than normal" was associated with neonatal, but not with intrapartum, cases.(ABSTRACT TRUNCATED AT 250 WORDS)

Prognosis for twins with birth weight

The purpose of this study of twins weighing <1500 gm was to evaluate the impact of cesarean section on intrapartum and neonatal mortality, as well as on cerebral palsy and mental retardation. National data held at the Medical Birth Registry was used for identification of cases. The original medical records were retrieved for 862 such twins born between 1973 and 1983. Twins with cerebral palsy and/or mental retardation born between 1973 and 1980 were identified by questionnaires to all rehabilitation centers for disabled children, offices for the Provision of Care for the Mentally Retarded, and to all local Boards of Education throughout Sweden. The analyses, including calculation of relative risk and 95% confidence interval, were performed after stratification for birth weight (250 gm classes) and period of delivery (1973 to 1976, 1977 to 1980, 1981 to 1983). The cesarean section rate increased from 7.7% (1973 to 1976), and 40.5% (1977 to 1980) to 68.9% (1981 to 1983). Concomitantly, intrapartum and neonatal mortality decreased markedly (51.7% to 29.1 %) particularly for twin II but to a much lesser extent for twin I. The relative risk for intrapartum and neonatal mortality (vaginal/ abdominal birth) did not increase significantly for twin I in vertex presentation (relative risk 2.0, 95% confidence limits 0.9 to 4.3), for twin I in breech presentation (relative risk 1.8, 95% confidence limits 0.7 to 4.3), for twin II in vertex presentation (relative risk 0.6, 95% confidence limits 0.2 to 1.6), or for twin II in breech presentation (relative risk 1.5, 95% confidence limits 0.7 to 3.0). The rate of cerebral palsy and/or mental retardation was 8.8% during 1973 to 1976 and 8.0 during 1977 to 1980 (χ2 = 0.1, p > 0.05). For twins born in breech presentation the handicap rate in the first period (cesarean section rate 6.0%) was the same as in the second period (cesarean section rate 59.6%). The analysis failed to reveal any significant impact of abdominal birth on the fetal outcome for low-birth-weight twins, even when fetal presentation was taken into consideration.

Outcomes of Care in Birth Centers

ROOKS, JUDITH P.; WEATHERBY, NORMAN L.; ERNST, EUNICE K. M.; STAPLETON, SUSAN; ROSEN, DAVID; ROSENFIELD, ALLAN Author Information

Outcomes of Care in Birth Centers

We studied 11,814 women admitted for labor and delivery to 84 free-standing birth centers in the United States and followed their course and that of their infants through delivery or transfer to a hospital and for at least four weeks thereafter. The women were at lower-than-average risk of a poor outcome of pregnancy, according to many but not all of the recognized demographic and behavioral risk factors. Among the women, 70.7 percent had only minor complications or none; 7.9 percent had serious emergency complications during labor and delivery or soon thereafter, such as thick meconium or severe shoulder dystocia. One woman in six (15.8 percent) was transferred to a hospital; 2.4 percent had emergency transfers. Twenty-nine percent of nulliparous women and only 7 percent of parous women were transferred, but the frequency of emergency transfers was the same. The rate of cesarean section was 4.4 percent. There were no maternal deaths. The overall intrapartum and neonatal mortality rate was 1.3 per 1000 births. The rates of infant mortality and low Apgar scores were similar to those reported in large studies of low-risk hospital births. We conclude that birth centers offer a safe and acceptable alternative to hospital confinement for selected pregnant women, particularly those who have previously had children, and that such care leads to relatively few cesarean sections.