When sperm fertilizes (meets) an egg, this fertilized egg is called a zygote (ZYE-goat). ... The genes that parents pass along are what make their children similar to others in their ... A female's internal reproductive organs are the vagina, uterus, fallopian tubes ... During childbirth, the cervix can expand to allow a baby to pass.
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When sperm fertilizes (meets) an egg, this fertilized egg is called a zygote (ZYE-goat). ... The genes that parents pass along are what make their children similar to others in their ... A female's internal reproductive organs are the vagina, uterus, fallopian tubes ... During childbirth, the cervix can expand to allow a baby to pass.
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