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  1. Preconception health

    Sep 26, 2025 · Preconception health is a woman's health before she becomes pregnant. It means knowing how health conditions and risk factors could affect a woman or her unborn

  2. Stages of pregnancy - Office on Women's Health

    Sep 26, 2025 · Pregnancy lasts about 40 weeks, counting from the first day of your last normal period. The weeks are grouped into three trimesters.

  3. Preconception care: Maximizing the gains for maternal and child …

    Feb 15, 2013 · Overview A new WHO report shows that preconception care has a positive impact on maternal and child health outcomes (1). Addressed primarily at health professionals …

  4. Pregnancy - NICHD - Eunice Kennedy Shriver National Institute of …

    Dec 30, 2020 · The events that lead to pregnancy begin with conception, in which a sperm penetrates an egg. The fertilized egg (called a zygote) then travels through the woman's …

  5. Sex-Based Definitions - Office on Women's Health

    Nov 14, 2025 · The sex of a human, female or male, is determined genetically at conception (fertilization), and is observable before birth. Having the biological function to produce eggs or …

  6. About Pregnancy | NICHD - NICHD - Eunice Kennedy Shriver …

    Oct 28, 2013 · Pregnancy is the term used to describe the period in which a fetus develops inside a woman's womb or uterus.Pregnancy usually lasts about 40 weeks, or just over 9 months, as …

  7. Contraception - World Health Organization (WHO)

    Nov 28, 2025 · Family planning allows people to attain their desired number of children, if any, and to determine the spacing of their pregnancies. It is achieved through use of contraceptive …

  8. Knowing if you are pregnant - Office on Women's Health

    Sep 26, 2025 · A missed period is often the first clue that a woman might be pregnant. Sometimes, a woman might suspect she is pregnant even sooner.

  9. What are some possible causes of female infertility?

    Oct 17, 2016 · Causes of female infertility can include failure to ovulate, menstrual cycle problems, structural problems, infections, and implantation failure.

  10. What are some common signs of pregnancy? - NICHD

    Dec 30, 2017 · The primary sign of pregnancy is missing a menstrual period or two or more consecutive periods, but many women experience other symptoms of pregnancy before they …