A postcoital test checks a woman's cervical mucus after sex to see whether sperm are present and moving normally. This test may be used if a woman is not able to become pregnant (infertility) and other tests have not found a cause.
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.
Charting your fertility cycle by taking your temperature, using ovulation detector kits, or checking your cervical mucus, will help you pinpoint when you are at your most fertile. WebMD provides the details of various do-it-yourself techniques.