Preconception stress and the secondary sex ratio in a population-based preconception cohort
نویسندگان
چکیده
منابع مشابه
Maternal preconception diet and the sex ratio.
Temporal variations in the sex ratio, or the ratio of boys to girls at birth, have been widely studied and variously attributed to social changes, conditions of war, and environmental changes. Recently, Mathews et al. ["You are what your mother eats: Evidence for maternal preconception diet influencing fetal sex in humans," Proc. R. Soc. bond. B 275:1661-1668 (2008)] studied the direct evidence...
متن کاملMaternal Blood Pressure Before Pregnancy and Sex of the Baby: A Prospective Preconception Cohort Study.
BACKGROUND Population-level sociologic studies have suggested that adverse societal conditions may affect fetal viability in a sex-specific manner and thereby modify the ratio of male vs. female babies. This concept suggests that there may exist certain physiologic features in a woman that relate to her likelihood of delivering a boy or girl. We thus established a preconception cohort to prospe...
متن کاملPreconception sex selection demand and preferences in the United States.
OBJECTIVE Preconception sex selection for nonmedical reasons raises important moral, legal, and social issues. The main concern is based upon the assumption that a widely available service for sex selection will lead to a socially disruptive imbalance of the sexes. For a severe sex ratio distortion to occur, however, at least two conditions have to be met. First, there must be a significant pre...
متن کاملSex Differences in Early-Age Mortality: The Preconception Origins Hypothesis.
The preconception origins hypothesis holds that some of the preconception and prenatal environmental factors that have been shown to determine the offspring sex ratio also explain sex differences in early-age mortality (Pongou 2013). It extends and complements the biological hypothesis, which affirms that the mortality sex gap originates in biological and genetic differences between the sexes. ...
متن کاملFolic acid supplementation, preconception body mass index, and preterm delivery: findings from the preconception cohort data in a Chinese rural population
BACKGROUND Folic acid (FA) supplementation before and during the first trimester can reduce the risk of occurrence of preterm delivery (PTD). Preconception body mass index (BMI) is also associated with PTD. This study aimed to investigate the combined effect of FA supplements and preconception BMI on the risk of PTD. METHODS The data of a cohort from 2010-2011 that was obtained through a prec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Fertility and Sterility
سال: 2017
ISSN: 0015-0282
DOI: 10.1016/j.fertnstert.2016.12.011