Pregnancy nausea

Morning sickness, also called nausea and vomiting of pregnancy (NVP), is a symptom of pregnancy that involves nausea or vomiting. Despite the name, nausea or vomiting can occur at any time during the day. Typically these symptoms occur between the 4th and 16th week of pregnancy. About 10% of women still have symptoms after the 20th week of pregnancy. A severe form of the condition is known as hyperemesis gravidarum and results in weight loss. Morning sickness, also called nausea and vomiting of pregnancy (NVP), is a symptom of pregnancy that involves nausea or vomiting. Despite the name, nausea or vomiting can occur at any time during the day. Typically these symptoms occur between the 4th and 16th week of pregnancy. About 10% of women still have symptoms after the 20th week of pregnancy. A severe form of the condition is known as hyperemesis gravidarum and results in weight loss. The cause of morning sickness is unknown but may be related to changing levels of the hormone human chorionic gonadotrophin. Some have proposed that it may be useful from an evolutionary point of view. Diagnosis should only occur after other possible causes have been ruled out. Abdominal pain, fever, or headaches are typically not present in morning sickness. Taking prenatal vitamins before pregnancy may decrease the risk. Specific treatment other than a bland diet may not be required for mild cases. If treatment is used the combination of doxylamine and pyridoxine is recommended initially. There is limited evidence that ginger may be useful. For severe cases that have not improved with other measures methylprednisolone may be tried. Tube feeding may be required in women who are losing weight. Morning sickness affects about 70–80% of all pregnant women to some extent. About 60% of women have vomiting. Hyperemesis gravidarum occurs in about 1.6% of pregnancies. Morning sickness can negatively affect quality of life, result in decreased ability to work while pregnant, and result in health care expenses. Generally mild to moderate cases have no effect on the baby. Most severe cases also have normal outcomes. Some women choose to have an abortion due to the severity of symptoms. Complications such as Wernicke encephalopathy or esophageal rupture may occur but are very rare. About 66% of women have both nausea and vomiting while 33% have just nausea. The cause of morning sickness is unknown. While some have claimed it to be due to psychological reasons, this is not supported by evidence. Nausea and vomiting may also occur with molar pregnancy. Morning sickness is related to diets low in cereals and high in sugars, oilcrops, alcohol and meat. Morning sickness may be an evolved trait that protects the baby against toxins ingested by the mother. Evidence in support of this theory includes: