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Fertilization -0LlEEPb2glY

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    Fertilisation is the union of a human egg and sperm, usually occurring in the ampulla of the uterine tube. It is also the initiation of prenatal development. Scientists discovered the dynamics of human fertilisation in the nineteenth century.
    The process of fertilization involves a sperm fusing with an ovum--usually following ejaculation during sexual intercourse. It is possible, but less probable, for fertilization to occur without sexual intercourse, artificial insemination, or In vitro fertilisation. Upon encountering the ovum, the acrosome of the sperm produces enzymes which allow it to burrow through the outer jelly coat of the egg. The sperm plasma then fuses with the egg's plasma membrane, the sperm head disconnects from its flagellum and the egg travels down the Fallopian tube to reach the uterus.
    In vitro fertilisation (IVF) is a process by which egg cells are fertilized by sperm outside the womb, in vitro -0LlEEPb2glY
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