How does a foetus develop?
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Fertilization happens when a sperm meets and penetrates an egg. Within about three days after conception, the fertilized egg is dividing very fast into many cells. It passes through the fallopian tube into the uterus, where it attaches to the uterine wall. The placenta, which will nourish the baby, also starts to form.
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a foetus is a unborn offspring of an animal development from embryo .
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