Yes, in most cases. But not in every case. There are severe chromosomal defects that result - if the baby makes it to term - in a very brief, painful existence. I don't really think anyone would choose that.
I didn't see that they went for another professional opinion. Doctors have been wrong in their diagnoses. Doctors told my Grandmother-in-law that she had a couple months to live and she didn't die until 46 years later. A friend of mine had a doctor to tell him he had better abort his baby or he would lose both his wife AND the baby. He chose life, and both the wife and baby are as healthy as can be today. Who is to say that the baby in this story really had what the doctor said he had. I guess we'll never know now will we?
Twice as many people die every year from medical malpractice as die in automobile accidents. I simply don't trust their diagnoses completely. I'm an Engineer. If I diagnose a machine wrong, the most that happens is I break some part of the machine and we replace it. A doctor makes a mistake...you bury that mistake.