![A woman with long dark hair wearing a white T-shirt holds her right hand over her mouth while her left hand braces her against the wall. The image conveys nauseousness.](jpg/122023_ti_morning_sickness_featb14e.jpg)
Health & Medicine
Fetuses make a protein that causes morning sickness in pregnancy
A hormone called GDF15 triggers a part of the brain involved in nausea and vomiting, a new study finds. Blocking its action may lead to treatments.