Marcosmith120's Posts
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doofanc:If semen gets in the vagina, the sperm cells can swim up through the cervix and uterus and into the fallopian tubes, looking for an egg. They have up to 6 days to find an egg before they die. If the ball of cells attaches to the lining of your uterus, it's called implantation — when pregnancy officially begins. |
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