North Americans are most likely to succeed in getting pregnant in late November and early December, especially if they live in the US South.

Pregnant women with severe or critical COVID-19, and their infants, face higher health risks, both before and after delivery.

New research finds a link between using marijuana during pregnancy and the risk of psychotic-like experiences, depression, and social problems for kids.

An unexpected discovery could provide stem cells for the creation of placenta tissue. Until now, that hasn't been possible.

Babies born to mothers who experience assault during pregnancy may face long-term health deficits. Will pandemic lockdowns make this more common?

Children born to moms who had gestational diabetes were "older" than their actual age, a new study shows. They were also at higher risk of health problems.

Most research on testosterone has focused on heterosexual couples. New research looks at the hormone's role in pregnancy in lesbian couples.

Opioid use during pregnancy can affect the placenta's structure, harming cells key for normal brain development, a study with mice suggests.

Opioid use during pregnancy can affect the placenta's structure, harming cells key for normal brain development, a study with mice suggests.

Excess weight among pregnant women may put the developing fetal brains at risk as early as the second trimester, a new study shows.