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Reproductions in Humans (Signs and Symptoms (Persistent fever, Severe…
Reproductions in Humans
Development of embryo
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Eventually, the embryo becomes embedded in the uterine lining
Villi will start to grow from the embryo into the uterine lining. They contain the blood capillaries of the embryo
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The amniotic sac encloses the embryo in a fluid-filled space called the amniotic sac, which contains amniotic fluid
Fertilisation
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To penetrate, the acrosome of the sperm releases enzymes
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As soon as a sperm enters the egg, the cell membrane changes so that no further entry will occur
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