babies
Sex Ratios at Birth Linked to Pollutants
A large, long-term study across the US and Sweden finds potential correlations between specific pollutants and the proportions of male and female babies born.
ABOVE: © ISTOCK.COM, JFAIRONE
Sex Ratios at Birth Linked to Pollutants
Sex Ratios at Birth Linked to Pollutants

A large, long-term study across the US and Sweden finds potential correlations between specific pollutants and the proportions of male and female babies born.

A large, long-term study across the US and Sweden finds potential correlations between specific pollutants and the proportions of male and female babies born.

ABOVE: © ISTOCK.COM, JFAIRONE
childbirth
Researchers Head to the Hills to Study Pregnancy
Amanda Heidt | Aug 1, 2021
High altitude is a natural laboratory for investigating pregnancy complications, such as preeclampsia and gestational hypertension, that restrict a fetus’s oxygen supply.
Fecal Transfer from Moms to Babies After C-Section: Trial Results
Ruth Williams | Oct 1, 2020
Tiny doses of maternal poo mixed with breast milk and given to Cesarean-born infants makes their gut microbiota resemble those of babies born vaginally.
Study: Antibiotics After Assisted Birth Reduce Maternal Infections
Ashley P. Taylor | May 14, 2019
Delivery guidelines should be updated to reflect these results, the authors write.
Human Birth Canal Varies More Widely than Previously Thought
Anna Azvolinsky | Oct 24, 2018
The pelvic bones of women have been shaped more by random evolution than by natural selection, a new study finds.
An Immunological Timeline for Pregnancy
Catherine Offord | Sep 1, 2017
A new study uses blood samples from pregnant women to track changes in the immune system leading up to birth, and predicts gestational age from the mothers’ immune signatures.
Study: Babies’ Microbiomes Indifferent to Mode of Delivery
Kerry Grens | Jan 23, 2017
Study of 81 six-week-olds who were born by C-section or vaginal delivery didn’t show differences in the structure or function of their microbiota, despite contrary results from other studies on babies. 
Early-Life Microbiome
Tracy Vence | Jun 16, 2016
Analyzing the gut microbiomes of children from birth through toddlerhood, researchers tie compositional changes to birth mode, infant diet, and antibiotic therapy.
Startup Licenses “Vaginal Seeding” Approach
Tracy Vence | Mar 31, 2016
Boston-based Commense plans to develop microbial and nonmicrobial interventions aimed at improving child health.
Opinion: A Mother’s Microbes
Rob Knight and Jack Gilbert | Mar 3, 2016
On “vaginal seeding” and the challenge of evidence-based parenting
Restoring C-Section Babies’ Microbiota
Catherine Offord | Feb 1, 2016
A small pilot study suggests exposure to maternal vaginal fluids could restore infant microbiota following Cesarean-section delivery.
Maturation of the Infant Microbiome
Kerry Grens | May 13, 2015
Gut microbial communities from breastfed babies are slow to resemble adults’ microbiota.
Clamping Cords Too Soon?
Kate Yandell | Jul 16, 2013
A review study indicates that clamping umbilical cords immediately after birth, rather than waiting a few minutes, may increase the risk of iron and hemoglobin deficiency in infants.