Causes of Infertility

(One-fourth of couples have more than one problem)

Male sperm problems:
Low quantity or quality affect 40 percent of infertile couples

Blocked fallopian tubes:
Prevents fertilization for 35 percent of infertile couples.

Poor ovulation:
It becomes more likely as women age and affects 25 percent of infertile couples.

Endometriosis:
Disease found in about 35 percent of women who have no other diagnosable infertility problem.

Other causes:
Poor cervical mucus clogs sperm; uterine lining unable to retain implanted embryo; mistiming of intercourse.

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