Morning Sickness

Morning sickness may be experienced with or without vomiting, but it usually is characterized by nausea, dizziness or queasiness.

What causes morning sickness during pregnancy?

Morning sickness is attributed to the rapid increase of pregnancy related hormones. Additionally, it is believed that your gastrointestinal system also contributes to the problem. Other triggers of nausea may be emotional stress, fatigue and severe headaches.

When does morning sickness occur during pregnancy?

Although it is commonly referred to as morning sickness, nausea and the related symptoms may occur at any time of the day or night. It is most common during the morning, but don’t be surprised if you are experiencing it at other times. It is most common during the first trimester and usually escalated between weeks 2 and 12. More than likely your morning sickness will subside or lessen by the 14th to 16th week of pregnancy.

How frequently does morning sickness occur?

Morning sickness is a common symptom of pregnancy affecting between 5o to 70% of all pregnant women. It usually affects mothers-to-be throughout their first trimester.

 

Sources:

Cunningham, F., MD; Leveno, K., MD; Bloom, S., MD; Hauth, J., MD; Gilstrap, L., MD; and Wenstrom, K., MD, Williams Obstetrics 22nd ed., McGraw-Hill, New York, 2005.

Duff, P., MD, Edwards, R., MD, Davis, J., MD, Rhoton-Vlasak, A., MD, Obstetrics and Gynecology: Just the Facts, McGraw-Hill, New York, 2004.

Scott, J., MD; Gibbs, R., MD; Karlan, B., MD; and Haney, A., MD, Danforth’s Obstetrics and Gynecology, 9th ed., Lippincott Williams & Wilkins, Philadelphia, 2003.

Crombleholme, W., MD, “Obstetrics,” Current Medical Diagnosis & Treatment 2003, 42nd ed., McGraw-Hill, New York, 2003.

DeCherney, A., MD, and Nathan, L., MD, Current Obstetric & Gynecologic Diagnosis & Treatment, 9th; McGraw-Hill, New York, 2003.

Harms, R., MD, Mayo Clinic Guide to a Healthy Pregnancy, HarperResource, New York, 2004.

Bankowski, B. MD., Hearne, A. MD, Lambrou, N. MD, Fox, H. MD, and Wallach, E. MD, The Johns Hopkins Manual of Gynecology and Obstetrics, 2nd ed., Lippincott Williams & Wilkins, Philadelphia, 2002.

American College of Obstetricians and Gynecologists, Planning Your Pregnancy and Birth, 3rd ed., ACOG, Washington DC, 2000.

Beck, W., MD, Obstetrics and Gynecology, B.I. Waverly Pvt., Ltd., New Delhi, 1997.

Johnson, R., MD, Mayo Clinic Book of Pregnancy & Baby’s First Year, William Morrow and Company, Inc., New York, 1994.