Infertility


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Definition

Infertility means you cannot make a baby (conceive).

Infertility is grouped into two categories:

  • Primary infertility refers to couples who have not become pregnant after at least 1 year of unprotected sex (intercourse).
  • Secondary infertility refers to couples who have been pregnant at least once, but never again.

Alternative Names

Inability to conceive; Unable to get pregnant


Causes, incidence, and risk factors

A wide range of physical and emotional factors can cause infertility. Infertility may be due to problems in the woman, man, or both.

FEMALE INFERTILITY:

Female infertility may occur when:

  • A fertilized egg or embryo does not survive once it sticks to the lining of the womb (uterus)
  • The fertilized egg does not attach to the lining of the uterus
  • The eggs cannot move from the ovaries to the womb
  • The ovaries have problems producing eggs

Female infertility may be caused by:

  • Autoimmune disorders, such as antiphospholipid syndrome (APS)
  • Cancer or tumor
  • Clotting disorders
  • Diabetes
  • Growths (such as fibroids or polyps) in the uterus and cervix
  • Birth defects that affect the reproductive tract
  • Excessive exercising
  • Eating disorders or poor nutrition
  • Use of certain medications, including chemotherapy drugs
  • Drinking too much alcohol
  • Obesity
  • Older age
  • Pelvic infection or pelvic inflammatory disease (PID)
  • Scarring from sexually transmitted infection or endometriosis
  • Thyroid disease
  • Too little or too much hormones

MALE INFERTILITY:

Male infertility may be due to:

  • A decrease in sperm count
  • Sperm being blocked from being released
  • Sperm that do not work properly

Male infertility can be caused by:

  • Environmental pollutants
  • Being in high heat for prolonged periods
  • Birth defects
  • Heavy use of alcohol, marijuana, or cocaine
  • Too little or too much hormones
  • Infection
  • Older age
  • Cancer treatments, including chemotherapy and radiation
  • Scarring from sexually transmitted diseases, injury, or surgery
  • Smoking
  • Use of certain drugs, such as cimetidine, spironolactone, and nitrofurantoin

In healthy couples under age 30 who have sex regularly, the chance of getting pregnant is about 25 - 30% per month.

A woman's peak fertility occurs in her early 20s. After age 35 (and especially 40), the chances that a woman can get pregnant drops considerably.


References

Jose-Miller AB, Boyden JW, Frey KA. Infertility. Am Fam Physician. 2007;75(6):894-856.

Lobo RA. Infertility: etiology, diagnostic evaluation, management, prognosis. In: Katz VL, Lentz GM, Lobo RA, Gershenson DM eds. Comprehensive Gynecology. 5th ed. Philadelphia, Pa: Mosby Elsevier; 2007: chap 41.

Speroff L, Fitz M, eds. Clinical Gynecologic Endocrinology and Infertility. 7th ed. Philadelphia, Pa; Lippincott Williams & Wilkins; 2005.

Brassard M, Melk YA, Baillargeon JP. Basic Infertility Including Polycystic Ovary Syndrome. Medical Clinics of North America. Sept 2008;92(5).


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Review Date: 2/28/2011
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Bellevue, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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Last Updated 6/21/2011
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