A lesbian couple announce they are going to have their first child

"But how can you get pregnant?" a friend asks. "Well first we go over health checks and have found we are suitable for pregnancy," says one mother-to-be. "And then we go over health checks in a sperm bank to find what sperm is most suitable for impregnation," says the other. "And then," says the first girl, "we go over more health checks to see how the sperm is inserted and we found it is safe for both of us." "But how do you decide which of you gets pregnant?" asks the friend. The couple look at each other and hold out one hand each. "Rock, paper, scissors!"