Time Of Birth Research Articles

Type 1 Narcolepsy in Pregnancy: A Case Report and Review of Literature

Abstract: Background: Type 1 Narcolepsy (with cataplexy) is a rare disorder affecting the central nervous system, and is characterized by the inability to control sleep-wake cycles. There is a paucity of data regarding management during pregnancy. Case: This is a 23-year-old with narcolepsy and cataplexy, treated with methylphenidate in the third trimester, resulting in an improvement of episodes of cataplexy. A review of the literature reveals information regarding options for medical management and the mode of delivery for these women. Conclusion: Type 1 Narcolepsy can be treated with medications after consideration of risks and benefits. For patients who are symptomatic at the time of birth, cesarean section may be the preferred mode of delivery in women with type 1 narcolepsy.

Use of Postpartum Hemorrhage Checklist during Vaginal Deliveries: A Quality Improvement Study.

Postpartum hemorrhage (PPH) protocols improve patient safety and reduce utilization of blood products; however, few data exist on sustainability of PPH checklist use, how use affects care delivery, and variation of use among patient subgroups. This study aimed to (1) examine compliance with PPH checklist use during vaginal deliveries, (2) evaluate whether checklist use varied by patient and/or care team characteristics, and (3) evaluate whether checklist use was associated with increased use of recommended medications/interventions. This was a quality improvement study performed from April 2021 through June 2023. A multidisciplinary team developed a revised PPH checklist and used quality improvement methodology to increase checklist use following vaginal birth. Data were collected from medical records and clinician survey. Control charts were generated to track checklist use and evaluate special cause variation. Chi-square tests and logistic regression were used to evaluate variation in medications/interventions and across subgroups. During the study period, there were 342 cases of PPH at the time of vaginal birth. The checklist was used in 67% of PPH cases during the 20-month period after implementation in a setting where no checklist was previously being used. We found no statistically significant differences in checklist use by patient or health care team characteristics. Use of tranexamic acid, carboprost, and misoprostol were significantly associated with checklist use. This study demonstrated successful implementation of a checklist protocol where no checklist was previously being used, with sustained use in an average of 67% of PPH cases over 20 months. Checklist use was consistent across subgroups and was associated with higher use of interventions shown to lower blood loss. · Our study showed sustainability of PPH checklist use over a 20-month period.. · PPH checklist use was associated with increased use of interventions known to reduce blood loss.. · Checklist was used consistently across patient subgroups; may help address inequities in obstetric outcomes..

Does preterm birth increase the initiation of antidepressant use during the postpartum? A population-based investigation.

Preterm birth may affect maternal mental health. We explored the relationship between preterm birth and the risk of initiating antidepressant use during the year after birth. We conducted a population-based investigation using regional healthcare utilization databases. The exposure considered was preterm birth. The outcome was having at least one prescription for antidepressant medications during the year after birth. We used a log-binomial regression model including terms for maternal age at birth, nationality, educational level, parity, modality of conception, modality of delivery, use of other psychotropic drugs, and diabetes to estimate relative risk (RR) and 95% confidence intervals (CI) for the association between preterm birth and the initiation of antidepressant use. In addition, the absolute risk differences (ARD) were also computed according to the timing of birth. The cohort included 727,701 deliveries between 2010 and 2020 in Lombardy, Northern Italy. Out of these, 6,522 (0.9%) women had at least one prescription for antidepressant drugs during the year after birth. Preterm births were related to a 38% increased risk of initiation of antidepressant use during the year after birth (adjusted RR = 1.38; 95% CI: 1.25-1.52) for moderate to late preterm and to 83% (adjusted RR = 1.83; 95% CI: 1.46-2.28) for extremely and very preterm. Excluding women with only one antidepressant prescription, the association was consistent (adjusted RR = 1.41, 95%CI: 1.23-1.61 for moderate to late preterm and adjusted RR = 1.81, 95% CI: 1.31-2.49 for extremely and very preterm). Also, excluding women who used other psychotropics, the association remained consistent (adjusted RR = 1.39, 95%CI: 1.26-1.54 and adjusted RR = 1.91, 95% CI: 1.53-2.38, respectively for moderate to late and extremely and very preterm). Women who delivered preterm may have an excess risk of initiation of antidepressant consumption during the first year after birth.

Opinions and approaches of pediatric surgery specialists and residents about neonatal resuscitation program-nrp: survey study

Aims: The Neonatal Resuscitation Program (NRP) is a course for healthcare professionals who can be called "those who touch the baby at the time of birth". The knowledge and skills obtained through this training program can be used in infant resuscitation at the time of birth and neonatal period resuscitation, which includes the first 30 days of life. It is aimed to evaluate the approaches of pediatric surgeons and research assistants in terms of their opinions and practices regarding NRP, as there are publications in the literature about the NRP experiences of other healthcare professionals. Methods: After receiving the approval of the Ethics Committee,the survey was published as a descriptive and cross-sectional study via the Google Docs system, and the participation of pediatric surgeons and research assistants was requested. Our research was conducted between October 2023 and March 2024 by asking the participants survey form questions via communication tools such as e-mail, telephone, social media, Internet. Data were sent to participants in the form of electronically prepared survey forms via e-mail addresses and social media platforms. It was collected electronically within the date ranges determined for the research. Results: Thirty-seven participants were male, and 40 participants were female. The average age of 77 pediatric surgeons who participated in the survey was determined to be 43.8 years old. Seventeen of the participants are research assistants; 24 of them are specialist physicians; 10 of them are Dr. Lecturers; 12 of them are associate professors; 14 of them were professors. It was determined that 48 of 77 physicians took the NRP course. It has been determined that those who took the NRP course can contribute more to resuscitation practices. Conclusion: It has been stated that pediatric surgeons are familiar with NRP applications and that as clinical experience increases, even among those who have not taken the course, interventions by NRP can be performed. It is seen that pediatric surgeons can effectively participate in NRP courses.

Clinical Characteristics Analysis of 1051 Cases of Cleft Lip With/Without Cleft Palate in the Ethnic Tibetan Population

To examine the characteristics of the prevalence of congenital cleft lip with/without cleft palate in the ethnic Tibetan population and to provide support for the precise prevention and treatment of cleft lip with/without cleft palate in the Tibetan population. The clinical data of Tibetan patients with cleft lip with/without cleft palate were collected and the clinical characteristics of the patients were analyzed. The patients' age ranged from 2 months to 51 years old. All the subjects were admitted to West China Stomatology Hospital, Sichuan University for the treatment of cleft lip with/without cleft palate between January 2016 and August 2023. Most of the subjects came from Sichuan Province and the Tibet Autonomous Region. A total of 1051 patients were enrolled and children aged under 12 months (460 cases) accounted for the largest proportion. Among the subjects, 383 had cleft lip only (36.44%), 140 had cleft palate only (13.32%), and 528 had cleft lip with cleft palate (50.24%). The male-to-female ratios of patients with cleft lip only (0.99∶1), cleft palate only (0.54∶1), and cleft lip with cleft palate (1.67∶1) exhibited significant differences (P<0.001). However, there was no significant difference in the male-to-female ratio in patients with cleft lip only or those with cleft lip with cleft palate when the subjects were divided into two groups according to whether they had unilateral or bilateral cleft lip with/without cleft palate. Most of the patients with bilateral cleft lip were female, while most of the patients with unilateral cleft lip and unilateral or bilateral cleft lip with cleft palate were male. The unilateral cleft lip with/without cleft palate was located predominantly on the left side. Syndromic cleft lip with/without cleft palate accounted for 3.43% of all the cases and the most common concomitant deformity was congenital heart disease. 3.81% (40 cases) of the patients had a family history. In the patients with cleft lip only and those with cleft palate only, the proportion of patients having parents with corresponding phenotypes was higher than those of other phenotypes of cleft lip with/without cleft palate. Regarding the birth time distribution of the children with cleft lip with/without cleft palate, Spring saw the highest number of births of these children (311 cases, 29.59%), while Winter saw the lowest number of births (231 cases, 21.98%). The cases of cleft lip with/without cleft palate in the ethnic Tibetan population are predominantly cleft lip and palate. Unilateral cleft lip only or cleft lip with palate is predominantly located on the left side. Lip disease phenotypes may be more heritable.

Identification of Short-Chain Fatty Acids for Predicting Preterm Birth in Cervicovaginal Fluid Using Mass Spectrometry.

Preterm birth (PTB) refers to delivery before 37 weeks of gestation. Premature neonates exhibit higher neonatal morbidity and mortality rates than term neonates; therefore, predicting and preventing PTB are important. In this study, we investigated the potential of using short-chain fatty acid (SCFA) levels, specific vaginal microbiota-derived metabolites, as a biomarker in predicting PTB using gas chromatography/mass spectrometry. Cervicovaginal fluid (CVF) was collected from 89 pregnant women (29 cases of PTB vs. 60 controls) without evidence of other clinical infections, and SCFA levels were measured. Furthermore, the PTB group was divided into two subgroups based on birth timing after CVF sampling: delivery ≤ 2 days after sampling (n = 10) and ≥2 days after sampling (n = 19). The concentrations of propionic acid, isobutyric acid, butyric acid, valeric acid, hexanoic acid, and heptanoic acid were significantly higher in the PTB group than in the term birth (TB) group (p < 0.05). In particular, the concentrations of propionic acid, isobutyric acid, hexanoic acid, and heptanoic acid were continuously higher in the PTB group than in the TB group (p < 0.05). In the delivery ≤ 2 days after sampling group, the propionic acid, isobutyric acid, hexanoic acid, and heptanoic acid levels were significantly higher than those in the other groups (p < 0.05). This study demonstrated a significant association between specific SCFAs and PTB. We propose these SCFAs as potential biomarkers for the prediction of PTB.

The Gut Microbiome–Human Body Symbiosis: Relevance of the Ubiquitous Microbial Community on Health and Development, Part 2

The human gut microbiome, comprising a range of microbial species (~100 to 1,000), is an extremely malleable ecosystem. It originates around the time of human birth and evolves as the infant grows until it matures into the relatively stable adult gut composition. Through this dynamic evolution, the composition of the gut microbiome is influenced or altered by factors such as diet, environment, mode of birth, genetics, infections, and medications. Strong associations between such alterations (dysbiosis) and diseases have led scientists to develop therapies that target a malfunctioning gut. Research is now focused on the microbiota or their associated metabolites as potential therapies. Treatment options explored include prebiotics, probiotics, postbiotics, synbiotics, fecal microbiota transplants, and live biotherapeutic products. The gut microbiome is not a panacea for all health issues; rather, it is part of a large network of interconnected operating systems within the human body. As communicators of scientific data, medical writers play a vital role in educating the public on the merits and limitations of gut microbiome therapeutics. Popular discourse, however, can be influenced by misinformation. With the ever-growing influence of social media, the lay reader must learn how to critically appraise the health information propagated by these sources. This second part of the gut microbiome series explores the association of the gut microbiome with human disease and the role that social media plays in influencing the popular perception and understanding of the importance of the gut microbiome. Approved and experimental therapies using the gut microbiome will be discussed.

Psycho-emotional state during pregnancy and one year after childbirth in mothers of children with functional gastrointestinal disorders

Aim. To determine the relationship between the incidence of functional gastrointestinal disorders in children up to 1 year of age and the psycho-emotional state of their mothers during pregnancy and after childbirth.&#x0D; Materials and methods. A survey of 1203 mothers of children under 4 years of age was conducted using a questionnaire of functional gastrointestinal disorders according to the Rome IV criteria (2016). The questionnaire contained domains on general issues (the age of the mother at the time of the child's birth, the data of obstetric and gynecological anamnesis, the type of child's nutrition at the time of the survey), psycho-emotional state (retrospectively, the psychological component of the gestational dominant – PСGD – during pregnancy, Beck's anxiety and Beck's depression questionnaires) and questions on functional disorders in infants and young children.&#x0D; Results. Questionnaires of 487 mothers of children of the 1st year of life were analyzed. Only in 34.4% of cases, mothers' responses lacked anxious and depressive PCGD. In mothers with anxious PСGD, the risk of regurgitation in their children was statistically significantly 2-fold higher compared to mothers with depressive PСGD. In mothers with optimal PСGD, the rate of colic in their children was statistically significantly 2-fold lower compared to mothers with anxious and depressive PСGD. After childbirth, anxiety was noted in 17% mothers and signs of depression in 59% mothers. Significant and severe depression was diagnosed in 10% mothers; the children of these mothers had persistent regurgitation.. In the absence of depression in mothers, the probability of no regurgitation and colic in their children was statistically significantly 2-fold higher compared to the children of mothers with depression.&#x0D; Conclusion. The incidence of functional gastrointestinal disorders in a child up to 1 year of age is associated with maternal anxiety during pregnancy and maternal depression after childbirth.

Vaccination against human papillomavirus in aggressive juvenile respiratory papillomatosis

In recent years there has been an increase in cases of papillomatosis of the upper respiratory tract, including in childhood, which is a significant problem. More than 70 % of children have severe recurrent forms of the disease. It has been proven that the development of respiratory papillomatosis is associated with infection with human papillomavirus, more often HPV types 6 and 11. The development of respiratory papillomatosis in childhood may be a consequence of infection with the human papillomavirus of the respiratory tract at the time of birth, and HPV reactivation may occur after injury or infection. The treatment of this condition is a significant problem, since during surgical treatment, only the visible pathological process is excised, and no effect on the etiological factor is produced. Therefore, the most optimal can be considered to be vaccination against HPV with available vaccines at the stage of pregnancy planning in previously unvaccinated individuals, as well as vaccination against HPV in already infected individuals with existing respiratory papillomatosis. In our article, we present a case of successful vaccination of a 2-year-old child with an aggressive course of respiratory papillomatosis against HPV.

The Potential Role of Leptin in the Regulation of Maternal Weight during Pregnancy and Its Impact on Neonate Weight and Apgar

Leptin is secreted by adipose tissue and expressed in several organs, including the placenta. We investigated the influence of leptin in maternal blood on leptin expression and concentration in the placenta and umbilical cord and its influence on fetal weight and conditions at the time of birth. Twenty-five parturients were recruited, and after childbirth, placental tissue fragments, umbilical arteries, and vein blood were collected. According to leptin concentration in maternal peripheral blood, parturients were divided into low and high leptin groups. Mothers in the high-leptin group had higher age, pre-pregnancy weight, pre-pregnancy BMI, and weight in late pregnancy than mothers in the low-leptin group. Children of mothers in the high-leptin group presented an Apgar score modestly lower than those of the low-leptin group. No differences were observed in leptin concentrations in the umbilical artery and vein. However, the leptin retained in the fetus increased in the high-leptin group compared to the low-leptin group. We observed a negative correlation between fetal leptin retained and maternal age in the low-leptin group. In the high-leptin group, placental leptin concentration was positively correlated with maternal weight in late pregnancy. Nonetheless, the expression of the leptin receptor (Ob-Rb) was negatively correlated with newborn length. In conclusion, this study found a positive correlation between maternal leptin levels and maternal pre-pregnancy weight, BMI, and fetal birth weight. These findings suggest a potential role of leptin in maternal weight regulation during pregnancy and fetal growth.

Prolonged renal function impairment in infants born during the peri-viable period: A retrospective longitudinal cohort study

BackgroundThe number of infants born during the peri-viable period who survive has been increasing. AimTo clarify renal function in infants from the time of birth during the peri-viable period until their due date. Study designThis retrospective cohort study was conducted at a single center. SubjectsWe reviewed the data of infants born at ≤28 weeks of gestation between 2018 and 2022 at our hospital. The infants were divided into the following groups: born at 22–24 weeks vs. 25–28 weeks (appropriate-for-gestational age [AGA] infants), and AGA infants vs. small-for-gestational age (SGA) infants (born at 22–28 weeks). Outcome measuresWe compared the perinatal data and renal function of the infants from birth until their due date. ResultsEighty-one infants were included. Their serum creatinine, fractional excretion of sodium, and urine glucose levels were high or positive soon after birth but gradually improved. The urine albumin level was significantly higher among AGA infants born at 22–24 weeks, even at term equivalent age, than among those born at 25–28 weeks. ConclusionsPersistent renal insufficiency was observed even around the term equivalent age in peri-viable infants. Follow-up data collected after the neonatal period should be investigated in these infants.

MicroRNA expression profiling of urine exosomes in children with congenital cytomegalovirus infection

Congenital cytomegalovirus (cCMV) infection can damage the central nervous system in infants; however, its prognosis cannot be predicted from clinical evaluations at the time of birth. Urinary exosomes can be used to analyze neuronal damage in neuronal diseases. To investigate the extent of neuronal damage in patients with cCMV, exosomal miRNA expression in the urine was investigated in cCMV-infected infants and controls. Microarray analysis of miRNA was performed in a cohort of 30 infants, including 11 symptomatic cCMV (ScCMV), 7 asymptomatic cCMV (AScCMV), and one late-onset ScCMV cases, and 11 healthy controls (HC). Hierarchical clustering analysis revealed the distinct expression profile of ScCMV. The patient with late-onset ScCMV was grouped into the ScCMV cluster. Pathway enrichment analysis of the target mRNAs differed significantly between the ScCMV and HC groups; this analysis also revealed that pathways related to brain development were linked to upregulated pathways. Six miRNAs that significantly different between groups (ScCMV vs. HC and ScCMV vs. AScCMV) were selected for digital PCR in another cohort for further validation. Although these six miRNAs seemed insufficient for predicting ScCMV, expression profiles of urine exosomal miRNAs can reveal neurological damage in patients with ScCMV compared to those with AcCMV or healthy infants.

Long-term embryo vitrification is associated with reduced success rates in women undergoing frozen embryo transfer following a failed fresh cycle

ObjectiveTo investigate the association of long-term embryo vitrification with the success rates and neonatal outcomes in frozen cycles. Study DesignA single-center, retrospective cohort study was performed in Peking University Third Hospital. We included women who had undergone their first vitrified-warmed cycles following an unsuccessful fresh embryo transfer cycle between January 2013 and December 2019. Restricted cubic splines with 4 knots (at min-3.0 months, 3.1–6.0 months, 6.1–12.0 months, 12.1-max months) were used to map the non-linear relationship between live birth and embryo storage time as a continuous variable after adjustment for covariates. Multiple logistic regression was used to calculate crude odds ratios (OR) and adjusted OR (aOR) with 95 % confidence intervals (CI). ResultsA total of 10,167 women undergoing their first frozen cycle following an unsuccessful fresh embryo transfer cycle were included, among whom 3,708 resulted in a live birth (3,254 singleton live births). Restricted cubic splines, both before and after adjusting for covariates, showed that the predicted live birth rate (LBR) progressively decreased with an increase in the duration of embryo cryopreservation. This trend was also evident when women were categorized into four groups based on the length of cryopreservation. The live birth rate (LBR) was highest in the 0.8–3.0 months group (38 %) compared to the other groups. Multivariable logistic regression with the 0.8–3.0 months group as the reference, demonstrated that the 6.1–12.0 months group and >12.0 months group experienced lower live birth rates (aOR = 0.82 (0.72, 0.94) and aOR = 0.71 (0.57, 0.88), respectively). The LBR for the 3.1–6.0 months group was comparable to that of the 0.8–3.0 months group, with an aOR of 0.98 (0.90, 1.07). Sensitivity analyses in women who underwent single blastocyst transfer, in women with at least one good-quality embryo for transfer, and in women with age less than 36 at embryo transfer demonstrated a similar association between LBR and embryo frozen time. The neonatal outcomes were not significantly different among the four groups. ConclusionsEmbryo vitrification greater than six months is associated with a reduction in success rate but does not appear to alter neonatal outcome.

Midwife-led birthing centres in Bangladesh, Pakistan and Uganda: an economic evaluation of case study sites

IntroductionAchieving the Sustainable Development Goals to reduce maternal and neonatal mortality rates will require the expansion and strengthening of quality maternal health services. Midwife-led birth centres (MLBCs) are an alternative...

Exploring Thyroid Dysfunction During Pregnancy: Implications for Anemia and Timing of Birth

Exploring Thyroid Dysfunction During Pregnancy: Implications for Anemia and Timing of Birth

Developmental patterns of extracellular matrix molecules in the embryonic and postnatal mouse hindbrain.

Normal brain development requires continuous communication between developing neurons and their environment filled by a complex network referred to as extracellular matrix (ECM). The ECM is divided into distinct families of molecules including hyaluronic acid, proteoglycans, glycoproteins such as tenascins, and link proteins. In this study, we characterize the temporal and spatial distribution of the extracellular matrix molecules in the embryonic and postnatal mouse hindbrain by using antibodies and lectin histochemistry. In the embryo, hyaluronan and neurocan were found in high amounts until the time of birth whereas versican and tenascin-R were detected in lower intensities during the whole embryonic period. After birth, both hyaluronic acid and neurocan still produced intense staining in almost all areas of the hindbrain, while tenascin-R labeling showed a continuous increase during postnatal development. The reaction with WFA and aggrecan was revealed first 4th postnatal day (P4) with low staining intensities, while HAPLN was detected two weeks after birth (P14). The perineuronal net appeared first around the facial and vestibular neurons at P4 with hyaluronic acid cytochemistry. One week after birth aggrecan, neurocan, tenascin-R, and WFA were also accumulated around the neurons located in several hindbrain nuclei, but HAPLN1 was detected on the second postnatal week. Our results provide further evidence that many extracellular macromolecules that will be incorporated into the perineuronal net are already expressed at embryonic and early postnatal stages of development to control differentiation, migration, and synaptogenesis of neurons. In late postnatal period, the experience-driven neuronal activity induces formation of perineuronal net to stabilize synaptic connections.

Grossesse par insémination intra-utérine après hystérosalpingo-foam-sonographie ou hystérosalpingographie

ObjectiveTo compare clinical pregnancy rates following intrauterine insemination performed after hysterosalpingography (HSG) or hysterosalpingo-foam-sonography (HyFoSy). Material and methodsThis is a retrospective study including 242 intrauterine insemination (IUI) performed between 2015 and 2020 at the fertility center of the Reunion Island. Among these inseminations, 121 with previous HSG and 121 with previous HyFoSy were matched. The main outcome of interest was clinical pregnancy rate. Secondary outcomes were birth rate and time to pregnancy after tubal patency test. ResultsThe pregnancy rate after insemination was 9.9% for the HSG group and 11.6% for the HyFoSy group, with no statistically significant difference between the groups (P=0.66). The live birth rate was similar in the two groups (7.4% for HSG and 10.7% for HyFoSy; P=0.37). Over half (57.1%) of the pregnancies occurred within 6 months after HyFoSy, whereas only 8.3% after HSG. ConclusionIUI results are not influenced by HyFoSy compared to HSG with regard to the pregnancy rates. Use of HyFoSy in infertility assessment allows global evaluation and more rapid adapted management. This approach could optimize management of patients undergoing IUI.

Treatment of Anorectal Malformations in German Hospitals: Analysis of National Hospital Discharge Data from 2016 to 2021.

Anorectal malformations (ARMs) are complex congenital anomalies. The corrective operation is demanding and schedulable. Based on complete national data, patterns of care have not been analyzed in Germany yet. All cases with ARM were analyzed (1) at the time of birth and (2) during the hospital stay for the corrective operation, based on the national hospital discharge data (DRG statistics). Patient's comorbidities, treatment characteristics, hospital structures, and the outcome of corrective operations were analyzed with respect to the hospitals' caseload. From 2016 to 2021, 1,726 newborns with ARM were treated at the time of birth in 388 hospitals. Of these hospitals, 19% had neither a pediatric nor a pediatric surgical department. At least one additional congenital anomaly was present in 49% of cases and 7% of the newborns had a birthweight below 1,500 g.In all, 2,060 corrective operations for ARM were performed in 113 hospitals in the same time period. In 24.5% of cases, at least one major complication was documented. One-third of the operations were performed in 56 hospitals, one-third in 20 hospitals, and one-third in 10 hospitals with median annual case numbers of 2, 5, and 10, respectively.Hospitals with the highest caseload operated cloacal defects more often than hospitals with the lowest caseload (7 vs. 2%) and had more early complications than hospitals with the lowest caseload (30 vs. 21%). This difference was not statistically significant after risk adjustment. Children with ARM are multimorbid. Early complications after corrective surgery are common. Considering the large number of hospitals with a very low caseload, centralization of care for the complex and elective corrective surgery for ARM remains a key issue for quality of care.

Follow Father or Mother? Understanding the Monoethnic Identification of Biethnic Children in China

Abstract In China, children’s ethnicity is often decided by their parents at the time of birth or during childhood; individuals are only allowed to be identified by a single ethnicity. Ethnic identification is therefore a contested issue shaped by the intra-family power structures that determine which parent’s ethnic heritage will be passed down. In this paper, we use China’s 2005 and 2015 inter-census surveys to examine the factors impacting the ethnic identification of children in interethnic families. We find the likelihood that children are identified with their fathers’ ethnicity decreased between 2005 and 2015. Relative to children with a minority mother and a Han father, those with a Han mother and a minority father, and those with parents from different minority groups have higher odds of following their father’s ethnicity. Being a girl, being older, having more educated parents, having urban or migrant status, and living in prefectures with a higher concentration of ethnic minorities all tend to lower the odds of identifying with the father. Moreover, stratified models demonstrate that in families where the father is the only minority parent, Islamic heritage positively predicts boys’ adoption of fathers’ ethnicity, but negatively predicts girls’ adoption. Eligibility for bonus points on the college entrance exam is negatively associated with the odds of following father when the mother is the only minority parent, but the association turns positive when the father is the only minority parent. The results illustrate the nuanced social processes involved in the social construction of ethnic identification.

Central limit theorem for euclidean minimal spanning acycles

In this paper, we investigate asymptotics for the minimal spanning acycles (MSAs) of the (Alpha)-Delaunay complex on a stationary Poisson process on [Formula: see text]. MSAs are topological (or higher-dimensional) generalizations of minimal spanning trees. We establish a central limit theorem (CLT) for total weight of the MSA on a Poisson Alpha-Delaunay complex. Our approach also allows us to establish CLTs for the sum of birth times and lifetimes in the persistent diagram of the Delaunay complex. The key to our proof is in showing the so-called weak stabilization of MSAs which proceeds by establishing suitable chain maps and uses matroidal properties of MSAs. In contrast to the proof of weak-stabilization for Euclidean minimal spanning trees via percolation-theoretic estimates, our weak-stabilization proof is algebraic in nature and provides an alternative proof even in the case of minimal spanning trees.