Why morning sickness can hit a pregnant woman so hard

Building up a tolerance to the hormone GDF15 prior to getting pregnant could help prevent morning sickness. — dpa

More effective treatments for severe cases of morning sickness could be on the horizon after researchers discovered the reason why some pregnant women suffer worse than others.

Academics from the United Kingdom, United States and Sri Lanka said that the condition is caused by exposure to the hormone GDF15 being produced by babies in the womb.