But morning sickness and one too many glasses of wine are certainly not the only reason you may be experiencing nausea in the morning. So, what is making you want to reach for the saltine crackers ...

Doctors still aren't sure exactly what causes morning sickness ... not just in the morning. On some level, the nausea can be reassuring -- an early sign that a tiny human being really is growing ...

Hyperemesis gravidarum affects 3% of pregnancies, causing severe vomiting and dehydration. Experts explain the causes, ...