Morning Sickness Treatment Diet
Nausea and vomiting occur in up to 90 of all pregnancies. Hyperemesis gravidarum (HG) has a prevalence of 0.35 to 1 , and is characterized by severe, persistent nausea and vomiting during the first trimester. Intractable vomiting requires aggressive support, including, at times, parenteral nutrition. Risk associations include increased body weight, multiple gestations, hyperemesis in a prior pregnancy, and nulliparity.
For many women, one of the first signs of pregnancy is morning sickness nausea, especially after rising from bed, in the first few months of gestation. The cause of morning sickness is unknown. One hypothesis is that it stems from the reduced intestinal motility caused by the steroids of pregnancy. Another is that it is an evolutionary adaptation to protect the fetus from toxins. The fetus is most vulnerable to toxins at the same time that morning sickness peaks. Women with morning sickness tend to prefer bland foods and to avoid spicy and pungent foods, which are highest in toxic compounds. In some women, the nausea progresses to vomiting.
Hyperemesis gravidarum. Gastroenterol Clin Goodwin TM. Nausea and vomiting of pregnancy an obstetric syndrome. Am J Obstet Gynecol 2002 185(5 Suppl Understanding) S184-9. Tsang IS, Katz VL, Wells SD. Maternal and fetal outcomes in hyperemesis gravidarum. Int J Gynaecol Obstet 1996 55 231-5.
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