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  2. Human fertilization - Wikipedia

    en.wikipedia.org/wiki/Human_fertilization

    Fertilization was not understood in antiquity. Hippocrates believed that the embryo was the product of male semen and a female factor. But Aristotle held that only male semen gave rise to an embryo, while the female only provided a place for the embryo to develop, [5] a concept he acquired from the preformationist Pythagoras.

  3. Human reproduction - Wikipedia

    en.wikipedia.org/wiki/Human_reproduction

    Chance of fertilization by menstrual cycle day relative to ovulation [15] Pregnancy rates for sexual intercourse are highest during the menstrual cycle time from some 5 days before until 1 to 2 days after ovulation. [16] For optimal pregnancy chance, there are recommendations of sexual intercourse every 1 or 2 days, [17] or every 2 or 3 days. [18]

  4. Human embryonic development - Wikipedia

    en.wikipedia.org/wiki/Human_embryonic_development

    Human embryonic development or human embryogenesis is the development and formation of the human embryo.It is characterised by the processes of cell division and cellular differentiation of the embryo that occurs during the early stages of development.

  5. Female reproductive system - Wikipedia

    en.wikipedia.org/wiki/Female_reproductive_system

    Chromosome characteristics determine the genetic sex of a fetus at conception. This is specifically based on the 23rd pair of chromosomes that is inherited. Since the mother's egg contains an X chromosome and the father's sperm contains either an X or Y chromosome, it is the male who determines the fetus' sex. If the fetus inherits the X ...

  6. Ovulation - Wikipedia

    en.wikipedia.org/wiki/Ovulation

    Ovulation is an important part of the menstrual cycle in female vertebrates where the egg cells are released from the ovaries as part of the ovarian cycle. In female humans ovulation typically occurs near the midpoint in the menstrual cycle and after the follicular phase. Ovulation is stimulated by an increase in luteinizing hormone (LH).

  7. Prenatal development - Wikipedia

    en.wikipedia.org/wiki/Prenatal_development

    The term "conception" refers variably to either fertilization or to formation of the conceptus after its implantation in the uterus, and this terminology is controversial. The zygote will develop into a male if the egg is fertilized by a sperm that carries a Y chromosome , or a female if the sperm carries an X chromosome . [ 5 ]

  8. From IVF to surrogacy, these women became moms through ... - AOL

    www.aol.com/lifestyle/ivf-surrogacy-women-became...

    At the time — Day's daughter was conceived in 1991 — children conceived through assisted conception were often referred to as "test-tube babies." Day asked her little girl if she'd heard the ...

  9. Fertilisation - Wikipedia

    en.wikipedia.org/wiki/Fertilisation

    This is an accepted version of this page This is the latest accepted revision, reviewed on 28 December 2024. Union of gametes of opposite sexes during the process of sexual reproduction to form a zygote This article is about fertilisation in animals and plants. For fertilisation in humans specifically, see Human fertilization. For soil improvement, see Fertilizer. "Conceive" redirects here ...