CRISPR reagents injected into the amniotic fluid inactivated a gene in the fetuses that would normally cause lung disease and kill the mice a few hours after birth.

Rodent and human studies have revealed a multitude of effects starting during gestation and lasting into adulthood.

Doctors treated the fetus, who has alpha thalassemia major, with cells from her mother’s bone marrow.

The disorder, called X-linked hypohidrotic ectodermal dysplasia, leaves patients unable to produce sweat, which can be life-threatening.

The lungs of extremely premature lambs supported in a closed, sterile environment that enables fluid-based gas exchange grow and develop normally, researchers report.

An upcoming clinical trial aims to correct for a disease of fragile bones in affected babies before they are born.

A study documents boys with autism who were exposed to elevated levels of testosterone, cortisol, and other hormones in utero.