What causes extreme morning sickness? What we know, don't know and suspect about hyperemesis gravidarum

Until about five years ago, scientists believed the pregnancy hormone, human chorionic gonadotropin (hCG), was the culprit.
Mother and Baby on MSN

2 months pregnant: Symptoms and baby development with expert advice from a midwife

At two months pregnant, your baby is rapidly developing key organs and features. Learn about common symptoms, what changes to ...