So bila beratus sperm nak rebut ovum tu, satu je dapat.
bila satu tu dapat, i mean dekat secondary oocyte lah. ada fertilisation membrane guarding the cell.
PREVENT OTHER SPERMS ENTERING THE OVUM.
bila dah fertilised, pregnant ah apa lagi.
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36 hours after fertilisation > zygote begins to divide repeatedly by mitosis, travels along Ftube, towards the uterus > devide, forms 2 celled embryo > morula > 5th day, morula is a ball of cells (blastocyst, blastula) > blastocyst is a fluid-filled sphere consisting an outer layer of cells & a group if cells inside sphere > 7 days after fertilisation, blastocyst attaches itself to the endometrium (implantation) > 8 weeks, stll embryo, 3 months, foetus, enclosed by a membrane (amnion) > amniotic fluid protects the foetus by absorbing shocks and cushioning it from any physical damage
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trophoblast - develop into placenta
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