To quantitatively assess the association between parity and all-cause mortality, we conducted a meta-analysis of cohort studies. Relevant reports were identified from PubMed and Embase databases. Cohort studies with relative risks (RRs) and 95% confidence intervals (CIs) of all-cause mortality in three or more categories of parity were eligible. Eighteen articles with 2,813,418 participants wer...

There is growing evidence that early growth influences bone mass in later life but most studies are limited to birth weight and/or early infant growth and dual-energy X-ray absorptiometry (DXA) measurements. In a British birth cohort study with prospective measures of lifetime height and weight, we investigated the growth trajectory in relation to bone in males (M) and females (F) at 60 to 64 y...

STUDY QUESTION Does the intergenerational influence on birthweight and birth length remain within female dizygotic and monozygotic twin pairs? SUMMARY ANSWER The intergenerational influence on birthweight and birth length remained within dizygotic but not within monozygotic twin pairs. WHAT IS KNOWN ALREADY Low birthweight is associated with increased morbidity and mortality in both the sho...

Women who deliver preterm (<37 completed weeks' gestation) are at high risk for recurrence. This has prompted exploration of candidate genes (both maternal and fetal) associated with preterm delivery. Epidemiologists can use recurrence patterns of preterm delivery across generations to assess the relative contributions of maternal and fetal genes. The authors used data from the Medical Birth Re...

This study was undertaken to examine whether there is an association between age at first birth and parity and risk of asthma death. The study cohort consisted of 1,292,462 women in Taiwan who had a first live birth between 1 January 1978 and 31 December 1987. We tracked each woman from the date of their first childbirth to 31 December 2009, and their vital status was ascertained by linking rec...

Innovations under National Rural Health Mission have paved the way for increased utilization of hospitals for childbirth. The association of increase in hospital deliveries with decline in the perinatal mortality rate in rural India after the launch of NRHM in 2005 was assessed using the Sample Registration System reports. Relative increase in hospital deliveries was 57% ;from year 2005 to 2008...

OBJECTIVE To study the relation between traumatic birth and the development of permanent facial palsy in the newborn. DESIGN Retrospective case control study of children with 'congenital' facial palsy. SETTING Two tertiary referral centres for patients with facial palsy. SUBJECTS 61 children with established facial palsy. MAIN OUTCOME MEASURES Odds ratios of recognised factors for birth...

The breeding season was investigated in 174 female cats that were acclimated under a natural photoperiod, and determined the interval between birth and initial estrus (puberty) was determined in 125 cats. Although the breeding season differed noticeably among individual animals, the mean was 180.4 +/- 3.0 (SE) days between the end of January and the end of July. The interval between birth and f...

Persistent homology and zigzag persistent homology are techniques which track the homology over a sequence of spaces, outputting a set of intervals corresponding to birth and death times of homological features in the sequence. This paper presents a method for choosing a homology class to correspond to each of the intervals at each time point. For each homology class a specific representative c...

Abstract Objectives Our objectives were to analyze how pregnancy outcomes varied by cesarean birth as compared vaginal across varying interpregnancy intervals (IPI) and determine if IPI modified mode of birth. Methods This secondary analysis used data from a prospective registry home hospital births in Chimaltenango, Guatemala January 2017 through April 2020, the Global Network for Women’s Chil...