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WebMD's guide to the causes of infertility in men and women.
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WebMD explains the causes, symptoms, and treatment of luteal phase defect, a disruption in the menstrual cycle that can make it difficult for a woman to become or remain pregnant.
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Women normally do not menstruate before puberty, during pregnancy, and after menopause. If a woman does not get her period when she normally should, it may be a symptom of a treatable medical condition. WebMD explains amenorrhea.
WebMD explains the causes of infertility and offers tips for getting pregnant.
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