Marlena Fejzo’s groundbreaking work implicates the hormone GDF15 as a key player in this understudied disorder.

Morning nausea or sickness can be a sign of pregnancy, but there are other possible causes of feeling nauseous in the morning. These include low blood sugar, dehydration, anxiety, and more.

A mum is urging people to 'keep an eye' on pregnant friends and family - after horror morning sickness left her vomiting up to 70 ... and having dark yellow and strong-smelling pee.