Jeff - we did lots of research before I went off of birth control.
Having a child wasn't something we were considering when I first moved in with John. We started reading more and more articles about women with HIV giving birth to HIV(-) babies. So we asked our specialist what he knew about it.
He referred me to two different OB specialists. One at Cedar Sinai, one at UCLA. We chose the UCLA one, since she was also a professor at the medical school and seemed the most experienced with my situation.

She told us that at the time she had delivered babies of 800 moms with HIV. One of the babies was born positive, but the mother had been referred to the doctor in her last month of pregnancy, so the mom wasn't able to bring her viral level down to undetectable. For supposedly religious reasons, that mom also refused a C-section.

We were told that in the previous two years, the risk of a HIV+ but non-detectable mom who would have a C-section transmitting the virus to the baby was .01%. This was still a huge consideration for us, but in the end we chose that I would stop taking birth control. Our reasoning was that it would be almost as possible for our child to be born with a different congential / genetic problem. We knew that IF (and it was a big IF) our child was born with any problems, including HIV, we had the finances to ensure that it had the best of medical care.
As it is, our child is negative, and although my experience of waiting for her first HIV tests to show that she was born negative made me age about 5 years, I wouldn't change my decision for the world.

Both of our specialists told us that the father having HIV had nothing to do with a risk to the baby, as HIV doesn't exist in the actual sperm cell - only the semen. It would only come into consideration if the mother was negative, then if the couple wanted to conceive, to be as safe as possible (and still try), they would do a procedure called sperm washing, where the sperm cells would be separated, and then normal in vitro fertilization would be done.

All of this is from personal research and info told to me by my specialists 7 years ago. I haven't had reason to do research since then, so I don't know the current statistics for what I did - have a non-detectable viral load, have a C-section, and be given IV meds during the C-section.
Feel free to look up current statistics, although they wouldn't have applied to my decision 7 years ago.

Finally, Jeff - I know that we have a lot of personal differences and that you think I was an irresponsible person for chosing to become a mother. You're entitled to your opinion.
Current medications make it likely for me to live a long, happy life and watch my daughter graduate from high school and more. John and I have both been non-detectable since well before our daughter was born. And if something should happen and either or both of die from a plane crash, cancer, or yes, even HIV... our child has an ample trust fund and the best godparents I could ever wish for.