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  2. Human fertilization - Wikipedia

    en.wikipedia.org/wiki/Human_fertilization

    Human fertilization is the union of an egg and sperm, occurring primarily in the ampulla of the fallopian tube. [1] The result of this union leads to the production of a fertilized egg called a zygote, initiating embryonic development. Scientists discovered the dynamics of human fertilization in the 19th century. [2]

  3. Implantation (embryology) - Wikipedia

    en.wikipedia.org/wiki/Implantation_(embryology)

    Implantation bleeding occurs between 7 and 14 days after fertilization, [56] and is a small amount of light vaginal bleeding or spotting that can occur in early pregnancy due to the blastocyst penetrating the lining of the uterus during implantation.

  4. Human embryonic development - Wikipedia

    en.wikipedia.org/wiki/Human_embryonic_development

    The normal period of gestation (pregnancy) is about nine months or 36 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days. [1] During this stage, the zygote divides in a process called cleavage.

  5. Timeline of human prenatal development - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_human_prenatal...

    Fertilization of the ovum to form a new human organism, the human zygote. (day 1 of fertilization [1]) The zygote undergoes mitotic cellular divisions, but does not increase in size. This mitosis is also known as cleavage. A hollow cavity forms marking the blastocyst stage. (day 1.5–3 of fertilization. [1])

  6. About 2% of babies born in the US are from IVF. Here’s what ...

    www.aol.com/vitro-fertilization-ivf-why-does...

    After fertilization, doctors watch the embryos as they develop, and what Feinberg often sees is that human reproduction is really inefficient, she said. If 10 eggs are exposed to sperm, about ...

  7. Human reproduction - Wikipedia

    en.wikipedia.org/wiki/Human_reproduction

    Chance of fertilization by menstrual cycle day relative to ovulation [14] Pregnancy rates for sexual intercourse are highest during the menstrual cycle time from some 5 days before until 1 to 2 days after ovulation. [15] For optimal pregnancy chance, there are recommendations of sexual intercourse every 1 or 2 days, [16] or every 2 or 3 days. [17]

  8. Development of the human body - Wikipedia

    en.wikipedia.org/wiki/Development_of_the_human_body

    A week after fertilization the embryo still has not grown in size, but hatches from the zona pellucida and adheres to the lining of the mother's uterus. This induces a decidual reaction , wherein the uterine cells proliferate and surround the embryo thus causing it to become embedded within the uterine tissue.

  9. 6 facts about abortion that everyone should know - AOL

    www.aol.com/lifestyle/6-facts-abortion-everyone...

    Whether you’re considering ending a pregnancy, have questions about abortion or just want to learn more, here are some important facts that everyone should know about abortion. 1) There are ...

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