Why do Women Vomit during Pregnancy?

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Why do Women Vomit during Pregnancy?

Some women do vomit during pregnancy and some do not. Fifty percent of pregnant women experience vomiting and nausea. Generally vomiting extends to a period of eight to ten weeks after the last menstruation period. The nausea and vomiting intensity might vary from person to person. The exact cause for vomiting and nausea during pregnancy is not known. The evidences available say that vomiting would be due to changes in hormone levels. The alterations in hormone levels results in changes in patterns of relaxation and contraction of muscles in the stomach and intestine. This muscular phenomenon brings up nausea and vomiting.

Many doctors believe that women who bear twins and triplets have more morning sickness. The exact cause for vomiting in pregnant women is not clear. The hormones that are considered to be causing nausea and vomiting are excess of human chorionic Gonadotropin, estrogen and progesterone. Though it is not proved properly, excess thyroid hormone was also considered as the cause of vomiting in pregnant women. Serotonin is also another hormone that is said to be involved in nausea and vomiting during pregnancy. It is observed to affect central nervous system and gastro intestinal tract. Research also says that low blood sugar level will also tend to enhance the nausea condition.

Some studies have found that women who have nausea towards birth control tablets and migraine have greater chances for nausea and vomiting during pregnancy. If the pregnant mother in a family suffered from hyperemesis gravidarum then there is higher chance of her daughter also to suffer from that condition during her pregnancy. Hyperemesis gravidarum is a severe morning sickness that occurs during pregnancy. The bacteria called Helicobacter pylori were found to be present in pregnant women as well as in those with hyperemesis gravidarum. Apart from all these reasons it is also thought that pregnant women might vomit due to some psychological feeling against pregnancy.

Author: Hari M

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