Frequency Of Twin Pregnancies Research Articles

P–789 Obstetric and perinatal outcomes in poor ovarian responders and normal responders flowing fresh embryo transfer: a prospective, monocentric, observational study

Abstract Study question Whether women pregnant after a poor response in IVF have obstetric and perinatal complications more frequently than women with pregnancies after a normal response in IVF? Summary answer There were no statistically significant differences in obstetric and perinatal complications rate between poor responders and normal responders in Chinese women. What is known already Poor ovarian response usually indicates a reduction in follicular response, resulting in a reduced number of retrieved oocytes. Patients are less likely to conceive and have a higher risk of cycle cancellation and low clinical pregnancy rate. Whether poor ovarian response is associated with obstetric and perinatal complications is however debated. Study design, size, duration Design: Prospective, monocentric, observational study. Size: 1664 women with poor ovarian response and 1061 women with normal ovarian response duration : July 1, 2017 to Aug 15, 2019.Participants/materials, setting, methods: 1664 women with poor ovarian response and 1061 women with normal ovarian response undergoing IVF or ICSI were enrolled in this study. The primary outcome was obstetric and perinatal complications rate. Main results and the role of chance 1664 women with POR and 1061 women with NOR were enrolled in this study.Poor and normal responders did not have significantly different incidences in obstetric and perinatal complications(25.42% vs 25.45%), nor were there a significant difference in preeclampsia, gestational diabetes mellitus, postpartum hemorrhage or abruptio placentae. But POR group have a lower frequency of twin pregnancies(8.47% vs 28.66%,P<0.01),low birth weight(5.08% vs 14.23%,P<0.01)and prematurity (9.32% vs 17.03%,P<0.01). Limitations, reasons for caution Despite its size, an observational study such as this has a number of inherent limitations, and the best way to confirm its findings will be to compare obstetric and perinatal outcomes in different subgroup of pregnancies following ART in an adequately powered randomized, controlled trial. Wider implications of the findings: This prospective, monocentric, observational study suggests that women with poor ovarian response did not have higher perinatal complication rate than women with normal ovarian response. Oocyte quality and quantity may not affect the rate of perinatal complications. Trial registration number Not applicable

A three year review of twin deliveries in a specialist hospital in North-Western Nigeria

Background: Although the frequency of twin pregnancies varies from one ethnic group to another, there has been a general trend toward an increase recently. Maternal and perinatal mortality are higher in twin than singleton pregnancies. Most studies on twinning had been done in university teaching hospitals where conditions are different from what is seen in secondary-care health institutions where this study was done Objectives: To determine the incidence, mode of delivery and maternal and perinatal outcomes of twin deliveries at a secondary-level hospital in North-Western Nigeria. Methodology: This was a descriptive study of 96 twin deliveries over a three-year period between May 2013 and April 2016 at a secondary-level hospital with access to specialist obstetricians and paediatricians. Result: There were 4,567 deliveries, with 101 twin deliveries, an incidence of 2.2% or 1 in 45 deliveries. The mean maternal age and parity were 26.4 years and 3.2 respectively. The mean gestational age at delivery was 35.9 weeks, with a mean birth weight of 2.18kg and 2.01kg for the first and second twins respectively. Male twins constituted 53.2% of twin births. The common presentations of the twins were cephalic–cephalic (64.6%), cephalic–breech (16.7%) and breech–breech (6.3%). Mode of deliveries were vertex vaginal (77.1%) and caesarean (14.6%). Breech presentation of the leading twin was the commonest indication for caesarean section (57.1%). Anaemia in pregnancy (16.7%) was the commonest maternal complication, while prematurity was the leading cause of perinatal mortality. Conclusion: Preterm delivery, malpresentation, operative delivery and maternal anaemia in pregnancy were commonly seen in association with twin pregnancy in this cohort of patients.

Perinatal Outcome in Twin Pregnancy at Khaipur Medical College, Khairpur Mirs, Pakistan

Objective: To determine the perinatal outcome of twin pregnancy and to find out the frequency of twin deliveries in hospital based population.
 Study Design: Descriptive case series.
 Place and Duration of Study: The study was conducted over a period of 02 Year 1st January 2018 to 31st December 2019 in the Obstetrics and Gynaecology Department at KMC Khairpur Mirs, Sindh Pakistan.
 Methodology: All the patients of age 20-35 years with twin pregnancies of gestational age above 30 weeks presenting in labour ward of KMC Khairpur Mirs were studied. A detailed history was taken, general physical (G.P) examination and obstetrical examination performed, targeted investigations carried out to detect various fetal complications. Patients were assessed for a mode of delivery, records for data like age, gestational age, weight of baby, APGAR score expressed in term of mean±SD and data like perinatal mortality, prematurity, intra uterine growth restriction (IUGR), the weight of baby and APGAR score expressed in terms of frequencies and percentages on SPSS version 20.
 Results: In this study total numbers of deliveries were 7200, among them 83 were twin pregnancies the frequency of twin was 1.15%. Booked cases were 24.1%, unbooked was 75.9%. The highest incidence of 42.2% of twin gestation was seen in women between ages 31-35 years, the mean age of patients was seen 30.1±4.1 and regarding the parity incidence was high 54.2% in multiparous l-5. The total number of preterm deliveries was 45(55.2%), gestational age was (35-36+6dnys) weeks in 22.89% of cases, and the mean gestational age of patients was 35.7±2.5. Perinatal mortality was 38(22.9%), stillborn and early neonatal deaths (ENND) were 18.4% and 36.8% and common in twin-2.
 Conclusion: Twin pregnancy is-a-high-risk-pregnancy still is a major obstetrical and perinatal challenge. The frequency of twin pregnancy seen in this study is 1.15% unbooked and unsupervised pregnancies are more common i.e 75.9%. Prematurity is common perinatal morbidity 51.20%. perinatal mortality is 22.9% and highest in twin-2.

245. The development of pre-eclampsia in oocyte donation pregnancies is related to the number of HLA class II mismatches

Introduction Oocyte donation pregnancies are associated with a higher incidence of pregnancy complications, such as pre-eclampsia. In OD pregnancies the fetus may be completely allogeneic to the mother, since the fetus carries paternal and donor derived Human Leukocyte Antigen (HLA) genes. The higher incidence of pregnancy complications might be related to the high level of immunogenetic dissimilarity, reflected by the number of HLA mismatches. Objective/hypothesis We studied the number of HLA mismatches in OD pregnancies in relation to pre-eclampsia. Methods In this retrospective study, HLA typing was performed in 99 women pregnant after OD and 118 children between 2004 and 2017. The HLA-genotype was determined for HLA-A, HLA-B, HLA-C (HLA class I), HLA-DR and HLA-DQ (HLA class II). The number of HLA mismatches of the child was calculated at the national reference laboratory for histocompatibility testing (LUMC). Results Twenty-two women developed preeclampsia in our group of 99 oocyte donation pregnancies. Maternal age and the frequency of twin pregnancies was significantly higher in the pre-eclampsia group, whereas gestational age was significantly lower in OD pregnancies complicated by pre-eclampsia. The number of HLA class II mismatches of the child was significantly higher in the cases with pre-eclampsia (n = 2.35 vs 3.15; p = 0.014; OR = 1.964 (95% CI = 1.149–3.355)), even after correction by logistic regression for maternal age and twin pregnancies. No significant effect of HLA class I mismatches was observed. Discussion This study showed that OD pregnancies with a higher level of HLA class II mismatches have a significantly higher chance to develop pre-eclampsia. Hence, HLA class II matching could be considered in OD pregnancies to decrease the risk of developing pre-eclampsia, and preventive pre-eclampsia treatment (aspirin) could be considered in OD pregnancies with a higher level of HLA class II mismatches.

Diez años de reprodución asistida de alta complejidad en los Andes del Perú

Introducción: La infertilidad es un diagnóstico cada vez más frecuente, tanto a nivel del mar como en las grandes alturas, y el desarrollo de técnicas de reproducción asistida de alta complejidad en los Andes del Perú es imprescindible. Objetivo: Definir los resultados de estas técnicas en una institución a 3 330 metros sobre el nivel del mar. Diseño: Estudio descriptivo y retrospectivo. Institución: Centro de Fertilidad y Ginecología del Sur, Cusco, Perú. Pacientes: 576 pacientes con infertilidad atendidas entre los años 2005 al 2015. Métodos: Se revisó los registros de los procedimientos realizados y se estableció las tasas de embarazo clínico según la edad y días de cultivo, tanto en ovocitos autólogos como en ovodonación. La significancia estadística de las diferencias encontradas fue analizada por medio de la prueba exacta de Fisher. Principal medida de resultados: Tasa de embarazo clínico. Resultados: Las tasas de embarazo clínico fueron: 30,4% en ovocitos autólogos, 42,4% en ovodonación y 25,0% en maduración in vitro de ovocitos. La frecuencia de embarazo doble fue 31,6%, y triple, 7,9%. Conclusiones: Las tasas de embarazo clínico fueron similares a las observadas internacionalmente. Destaca la necesidad de estrategias para disminuir la pluralidad de los embarazos, así como para mejorar la tasa de embarazo en las mujeres ≥ 37 años.

Hungarian twin studies: results of four decades

Twin studies play a role in examining the contribution of genetic variations and environmental factors responsible for the determination of phenotypic variables and of genetic linkage between genotypes. Hungarian twin studies, supported by three twin registries (among them two twin-database), date back to 1970s. Studies mainly focused on various congenital abnormalities, the effect of contraceptive pills and folic acid on the frequency of twin pregnancies, as well as psychosexual and alcohol consumptional behaviors. Monogenic Mendelian inheritance of lactose (mal)absorption was demonstrated for the first time. Hungarian Twin Registry was founded in 2007, which contributed to the current understanding on the background of several disorders, e.g. metabolic syndrome and atherosclerosis. As part of an international twin study, among others, arterial stiffness, central blood pressure, carotid intima/media thickness, venous biomechanics, body composition, lung function and smoking characteristics were also assessed. Absence of genetic background in non-alcoholic fatty liver disease and high inheritance of carotid plaque characteristics were demonstrated for the first time. The review also aims to summarize future plans of the Hungarian Twin Registry.

Neonatal status of twins

Multiple pregnancy is a pregnancy where more than one fetus develops simultaneously in the womb, as a result of the ovulation and fertilization of more than one egg. It is relatively rare in humans and represents the rest of the phylogenetic stages. The most common are twins and they indicate the development of two fetuses in the womb. The frequency of twin pregnancies is about 1%. Multiple pregnancies belong to a group of high-risk pregnancies because of the many complications that occur during the pregnancy: higher number of premature deliveries, bleeding, early neonatal complications and higher perinatal morbidity and mortality. Such pregnancies and infants require greater supervision and monitoring. The aim of this study was to determine the percentage of baby twins born at the maternity ward of the General Hospital in Prokuplje and their morbidity and mortality. Data on the total number of deliveries, number of twins, parity and maternal age, gestational age, body weight of twins, method of delivery, Apgar score and perinatal mortality were collected and statistically analyzed by means of retrospective analysis of operative birth and neonatal protocol for 6 years (2005 of 2010). Out of 4527 mothers who gave birth 43 were pairs of twins, or 0.95% of women gave birth to twins. These babies are more likely born by Caesarean section, but delivered with slightly lower birth weight.

Fluconazole prophylaxis in high-risk, very low birth weight infants

Purpose : Fluconazole prophylaxis for very low birth weight (VLBW) infants has been shown to reduce invasive fungal infection and its mortality. This study aims to evaluate the effect of fluconazole prophylaxis in VLBW infants on the incidence and mortality of fungal infection. Methods : VLBW infants with endotracheal intubation and central vascular access admitted to the Neonatal Intensive Care Unit (NICU) at Chonnam University Hospital were enrolled. Twenty eight infants of 7-month baseline period from January to July 2005 (‘non-fluconazole group’) were compared with 29 infants of a 7-month fluconazole period from January to July 2006 (‘fluconazole group’). Results : Gestational age, birth weight, sex, mode of delivery, frequency of twin pregnancy, chorioamnionitis, antenatal steroid and rupture of membranes were similar between the fluconazole and nonfluconazole groups. The rate of extremely low birth weight (ELBW) infants, frequency and duration of prophylactic antibiotics, total parenteral nutrition and umbilical catheters, duration of intralipid, mechanical ventilation and nasal continuous positive airway pressure (CPAP) were also not significant. However, frequency of percutaneous central venous catheterization (PCVC) and intralipid administration, and duration of PCVC were significant between the two groups. The overall incidence and mortality of fungal infection were not different between the two groups. Although the Malassezia infection was increased in the fluconazole group (P

Frequency of Twin Pregnancies Following Renal Transplantation

Objective: To evaluate the incidence of twin pregnancy among renal-transplanted women.Methods: A retrospective review based on three national inquiries. A computer literature search of the Medline system was done. Only reports of series were included. For statistical analysis the probability of having a twin pregnancy was assumed to be 0.012.Main Outcome Measures: Incidence of twin pregnancy in women after renal transplantation.Results: There were 7 sets of twins among 153 pregnancies reported in the national inquiry group (4.57%). Thus, the overall incidence of twin pregnancy in these women was 1 in 22 pregnancies. The frequency of twinning in series reporting pregnancies after renal transplantation was 1.84%, a figure statistically greater than the expected number of twins (P = 0.001).Conclusions: The frequency of twin pregnancy appears to be increased among renal-transplanted women.

HIV-I infection in perinatally exposed siblings and twins. The Italian Register for HIV Infection in Children.

In a multicentre study on perinatal HIV-I infection including 1493 children born from 1471 pregnancies to 1415 infected mothers, 22 twin pairs and 56 sibships (115 children) were recorded. The frequency of twin pregnancies was 1.5 (22/1471) and 3.9% (56/1415) seropositive women had more than one at risk pregnancy. In 18 twin pairs with a known infection status nine of the 36 children (25%) were infected. Discordance in infection status was present in only one (5.5%) dizygous pair. A high relative risk of infection (23.1) in a twin was observed when the other was infected. Infection was unrelated to gestational age, mode of delivery, or birth weight. Infection status was defined in 41 sibships (84 children including one first born twin pair and one third born child). When the first born was infected, 11/26 (42.3%) second born children were also infected, whereas this happened in only 2/16 (12.5%) second or third born children when the first born was uninfected. Two out of nine first born (22.2%) and 5/21 (23.8%) second born children prospectively followed up from birth acquired the infection. Results of this study demonstrate that neither twin nor second pregnancies are at increased risk of mother to child HIV-I transmission. Overall data suggest that non-casual factors in mother and/or child influence perinatal infection.

The value of embryo transfer to cattle breeding in Britain.

An analysis is made of the maximum expenditure which could be justified in embryo transfer in cattle is used to: increase the rate of genetic improvement of dairy or beef cattle; increase the frequency of twin-pregnancies; and expedite a change of breed. Estimates of maximum justifiable expenditure have been compared with an estimate of the cost of non-surgical transfer. Embryo transfer should be used in elite beef herds to increase selection intensity, particularly if bulls from such herds can be used for artificial insemination. Other commercial applications will not be economically justifiable until the cost of transfer has fallen by 50 to 80 per cent.