What causes vomiting during the early stages of pregnancy?

zbeckabee

There is insufficient evidence to pin down a single (or multiple) cause, but the leading theories include: An increase in the circulating level of the hormone estrogen. Estrogen levels may increase by up to a hundredfold during pregnancy. Low blood sugar during pregnancy. An increase in progesterone relaxes the muscles in the uterus, which prevents early childbirth, but may also relax the stomach and intestines, leading to excess stomach acids. An increase in human chorionic gonadotropin. An increase in sensitivity to odors. Eating vegetables. Vegetables produce a small amount of toxins to deter insect infestation and while these toxins are normally harmless to humans, they are potentially dangerous to embryos. One theory suggests that becoming nauseated during pregnancy is an evolutionary measure to prevent a mother from eating vegetables, thereby protecting the embryo from the toxins. Other studies, however, have linked consumption of fruits and vegetables to higher birth weights, which tend to mean healthier babies. Intake of alcohol, sugar, oils and meat, which have been postulated to cause a natural trigger of morning sickness in the body as a way of discouraging ingestion of less healthy foods. http://en.wikipedia.org/wiki/Morning_sickness Sep 01 06, 4:00 PM

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