Because I believe a woman's choice would take a back seat in that scenario and we have been told by the left someone is born gay. I want to either confirm I am right or have a 100 percent pro choice person who believes in gay rights to tell me a woman has every right to abort her fetus if she is told it will likely be homosexual. I think it is very helpful as it helps clarify and prioritize beliefs and it helps us understand you better.
Ok, first and foremost, someone is born gay. Not because it has been told by the "left", because that is nature and nature is neither left or right. Don't tell me you are one of those with the absolute stupid believe that a homosexual can be "cured" from his homosexuality, now do you.
So that said, I will answer your question in a bit different way. Identifying gay-gen will be very difficult, probably a lot of different genes working together and it is a sliding scale no matter what. It is the same with intelligence, will be very hard to manipulate or asses. We, as a society, have to decide on what we want to test our fetuses when it becomes possible. It is already possible to identify some very nasty diseases and yes, the expecting parents need to decide if they want this information or not. The same can be said for more common abnormalities like down syndrome. It is up the parents to decide to have this baby not. If you could identify every problem, nobody would be born, there is not such a thing as a perfect baby or human being. Each trade, each fault, each problem has indeed its drawbacks, there is another side to this as well, some problems have some other enhanced trades: dyslexia is a problem, but people with dyslexia are more creative. So do you want to abort someone with dyslexia? Now to bring it closer to home, I have had a schisis in the jaw, people will name that at the same level as the syndrome of dawn sometimes. Now to put it plain and simple for you, yes, the ultimate decision lies with the expecting parents if they want to have that child or not. It is not for society to decide this for the parents. They can abort the fetus on any ground they choose, any they see fit. Whether it is homosexuality, a schisis or being a boy or a girl.
We might criticize the parents for it, we may have a public debate about it, but ultimately it is up to the parents.
So there you have it, a stupid Eurosocialist, liberal in every way, a believer in equal rights for everyone saying yes: if you are as backward as to have your homosexual unborn aborted because of his homosexuality then yes go ahead, just do it. And I must say, those expecting parents would probably not be the right folks to bring up such a child in the first place, so a lot of sorrow would be spared. Secondly, probably those parents whom would feel this way are some extremist Christians or Muslims or so whom wouldn't want to have an abortion anyway, so that makes your question a hypothetical one. But I decided to answer your question anyway.
Now, let me ask you a question. Why do you feel the society has the right to enforce a pregnancy on a woman? Enforce a child to be born whom isn't welcome? Forcing a child to grow up in knowing nobody wanted him to be alive?