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Risk factors

By Mayo Clinic staff

Morning sickness can affect anyone who's pregnant. You might be more likely to experience morning sickness if:

  • You experienced nausea or vomiting from motion sickness, migraines, certain smells or tastes, or exposure to estrogen (in birth control pills, for example) before pregnancy
  • You experienced morning sickness during a previous pregnancy
  • You're pregnant with twins or other multiples
Complications Causes
References
  1. Smith JA, et al. Treatment of nausea and vomiting of pregnancy (hyperemesis gravidarum and morning sickness). http://www.uptodate.com/home/index.html. Accessed Aug. 22, 2011.
  2. Hill CC, et al. Physiologic changes in pregnancy. Surgical Clinics of North America. 2008;88:391.
  3. Morning sickness. The American College of Obstetricians and Gynecologists. http://www.acog.org/publications/patient_education/bp126.cfm. Accessed Aug. 24, 2011.
  4. You and your baby: Prenatal care, labor and delivery, and postpartum care. The American College of Obstetricians and Gynecologists. http://www.acog.org/publications/patient_education/ab005.cfm. Accessed Aug. 24, 2011.
  5. Holst L, et al. The use and the user of herbal remedies during pregnancy. The Journal of Alternative and Complementary Medicine. 2009;15:1.
  6. Goodwin TM. Hyperemesis gravidarum. Obstetrics and Gynecology Clinics of North America. 2008;35:401.
  7. Ginger. Natural Medicines Comprehensive Database. http://www.naturaldatabase.com. Accessed Aug. 24, 2011.
  8. Acupressure. Natural Medicines Comprehensive Database. http://www.naturaldatabase.com. Accessed Aug. 24, 2011.
  9. Mason MC. Pain relief to a point. Nursing Standard. 2008;22:22.
  10. Simon EP, et al. Medical hypnosis for hyperemesis gravidarum. Birth. 1999;26:248.
  11. Czeizel AE, et al. The effect of periconceptional multivitamin-mineral supplementation on vertigo, nausea and vomiting in the first trimester of pregnancy. Archives of Gynecology and Obstetrics. 1992;251:181.
  12. Emelianova S, et al. Prevalence and severity of nausea and vomiting of pregnancy and effect of vitamin supplementation. Clinical and Investigative Medicine. 1999;22:106.
  13. Gill SK, et al. The effectiveness of discontinuing iron-containing prenatal multivitamins on reducing the severity of nausea and vomiting of pregnancy. Journal of Obstetrics and Gynaecology. 2009;29:13.
  14. Harms RW (expert opinion). Mayo Clinic, Rochester, Minn. Dec. 9, 2008.
  15. Refruezo JS, et al. Clinical features and diagnostic evaluation of nausea and vomiting of pregnancy (hyperemesis gravidarum and morning sickness). http://www.uptodate.com/home/index.html. Accessed Aug. 22, 2011.
DS01150 Oct. 4, 2011

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