"Morning sickness" is a misleading term. For some pregnant women, nausea is worse in the morning and eases up over the course of the day. But the condition can happen any time and, for many women, it lasts all day. The intensity of symptoms can also vary from woman to woman too.

The medical term for morning sickness is "nausea and vomiting of pregnancy." Up to three-quarters of pregnant women have at least some nausea or vomiting during the first trimester, and about half have only vomiting.

Even a mild case of nausea can wear you down, and bouts of round-the-clock nausea and vomiting can leave you exhausted and miserable. Talk with your provider about your symptoms and the options for relief.