There are a huge number of babies that survive when born really really early. Gavins son with someone else was born at 30 weeks. Which is not really
that early but my god he was tiny. He weighed next to nothing and was see through and it was just heartbreaking. In the incubator thing next to him there was a baby that had been born at 23 weeks fighting for its life. It ended up dying but Gavin still talks about that baby now, it really touched him
Doctors do refuse to do 'choice' based abortions late on though. Tends to be only if the baby will have a severe disability or if the mothers life is at risk somehow.