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Nausea in the morning - females; Vomiting in the morning - females
Morning sickness is nausea and vomiting that can actually occur at any time of the day during pregnancy.
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Morning sickness is very common. Most pregnant women have at least some nausea, and about a third have vomiting. Morning sickness usually begins during the first month of pregnancy and continues through the 14th to 16th week (3rd or 4th month). Some women have nausea and vomiting through their entire pregnancy.
Morning sickness does not hurt the baby in any way unless you lose weight, such as with severe vomiting. The amount of morning sickness during one pregnancy does not predict how you will feel in future pregnancies.
The exact cause of morning sickness is unknown. It may be caused by hormone changes or lower blood sugar during early pregnancy. Emotional stress, fatigue, traveling, or some foods can make the problem worse. Nausea in pregnancy is more common and can be worse with twins or triplets.
Gordon MC. Maternal physiology. In: Gabbe SG, Niebyl JR, Simpson JL, eds. Obstetrics: Normal and Problem Pregnancies. 5th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2007:chap 3.
Nausea and vomiting of pregnancy. ACOG Practice Bulletin No. 52. American College of Obstetricians and Gynecologists. Obstet Gynecol. 2004;103:803-815.
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