AI: Pregnancy variation

"I wish that this stone and only this stone would be changed as I specify in the next minute. The stone will turn into a vial of sperm. It is magically created and didn't come from any particular person, so anyone can use it without worrying about incest. It will grant wishes once opened, but will spoil in a day unless used to make someone pregnant. Pregnancy is guaranteed and the baby that it becomes part of will continue to grant wishes when touched. Being inside a pregnant mother counts as being touched.