Background Exposure to fatal police violence may play a role in population‐level inequities
in risk for preterm delivery. Objective To evaluate whether exposure to fatal police violence …

Abstract According to the Trivers-Willard (TW) hypothesis there is an interaction between
individual status and investment in offspring such that high-status individuals invest more in …

Population stressors reportedly reduce the human secondary sex ratio (ie, the odds of a
newborn's being male) by, among other mechanisms, inducing the spontaneous abortion of …

We examine whether sex of child affects parents' beliefs about traditional gender roles.
Using an improved methodological approach that explicitly analyzes the natural experiment …

Sex ratio adjustment has become a hot topic in ecology and evolutionary biology, as
documentations of sex ratio skews are numerous, and include examples in diverse animal …

Background Natural selection should favour the ability of mothers to adjust the sex ratio of
offspring in relation to the offspring's potential reproductive success. In polygynous species …

Background Studies on birth weight and congenital anomalies in sub-Saharan regions are
scarce. Methods Data on child variables (gestational age, birth weight, sex, and congenital …

Background The expected ratio of male to female births is generally believed to be 1.05,
also described as the male proportion of 0.515. Objectives We describe trends in sex ratio at …

Background: Restricting to live births can induce bias in studies of pregnancy and
developmental outcomes, but whether this live-birth bias results in underestimating …

In this article we show that the population of Serengeti Masai giraffes Giraffa camelopardalis
tippelskirchi is extremely female biased, particularly among newborns. Our results suggest …