how does a egg of a female fertilisas
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If one sperm does make its way into the fallopian tube and burrows into the egg, it fertilizes the egg. The egg changes so that no other sperm can get in. At the instant of fertilization, your baby's genes and sex are set.
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Most eggs are fertilized by sperm while still in the fallopian tube. The fertilized egg then travels down the fallopian tube into the uterus. ... When the egg reaches the uterus, it may attach itself to the uterine lining (the endometrium) and pregnancy will begin.
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