Dean Erin
Nurs Stand. 2016 Aug 10;30(50):15. doi: 10.7748/ns.30.50.15.s16.
Essential facts Eight out of ten pregnant women are affected by nausea and vomiting in pregnancy. It is one of the most common reasons for pregnant women being admitted to hospital. Despite being known as morning sickness, symptoms can occur at any time of the day or night. The severe form of nausea and vomiting in pregnancy, hyperemesis gravidarum, is much rarer and affects up to 3% of pregnant women. For most women, their symptoms improve or disappear by around week 14, although for some it can last longer.
十分之八的孕妇在孕期会受到恶心和呕吐的影响。这是孕妇住院的最常见原因之一。尽管被称为晨吐，但症状可在白天或夜间的任何时候出现。妊娠剧吐是孕期恶心和呕吐的严重形式，更为罕见，影响多达3%的孕妇。对大多数女性来说，她们的症状在大约14周时会改善或消失，不过对一些人来说可能会持续更长时间。
