Morning sickness is nausea that occurs during pregnancy. Morning sickness affects a large proportion of pregnant women. It is most common during the first trimester. 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. Hormonal changes of pregnancy are thought to play a role. Rarely, severe or persistent nausea or vomiting may be caused by a medical condition unrelated to pregnancy such as thyroid or liver disease.
Morning sickness is nausea that occurs during pregnancy. If your morning sickness symptoms persist, however, your pregnancy care provider may prescribe vitamin B-6 supplements, antihistamines and possibly anti-nausea medications.The study has investigated 2.3 million birth records in Norway from 1967-2006, Results from this study show that if the mother suffered from severe morning sickness, daughters were 3 per cent more likely to develop the condition in their own pregnancies, compared to 1.1 per cent among women, whose mothers did not suffer from the illness.