C'mon bro. You know the answer to that question. I mean, until men start giving birth through the anal cavity OMR is out of luck. 
1. Children can also be adopted. In fact I know homosexual couples who are better parents then most straight ones.
2. A lot of homosexual couples are raising the child(ren) that one of them had with a former partner or a woman who volunteered to carry.
The latter is quite widespread for African homosexuals. I don't know of one African homosexual who could even imagine spending his life without having children.
Welcome to 2014 brother