castreymcmu872

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    castreymcmu872

  • Mar 18, 2012

  Right at the moment of conception, life begins. It starts when the egg unites with the sperm. There are two types of sperm - the X and the Y. A baby girl is conceived if the X-sperm fertilizes with the egg while a boy is conceived if a Y-sperm unites with the egg. - This is how conception of a baby happens and thus; how baby gender is determined as well. bump on vagina
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