There is one thing I'd like to add, however. If God doesn't bless you with a biological child, please consider adoption. I am an adoptive parent and an adoptive grandparent. My daughter just called us yesterday to tell us that their adoption agency (she's got two from Guatemala) has male babies waiting for homes. They're going to go ahead and adopt again and hope to have their new son home before the summer. There are many ways that God finds exactly the right parents for children.
Thanks for the tip! If we aren't able to conceive, we probably will go with adoption.