Well in answer to your option.
Pro choice can be considered if its mistake done out of ignorance.
But come to think of it, some people like to take chances.
Imagine hearing something like
" let me get pregnant first if the baby is SS I terminate if otherwise I keep".
This is not right at all as there are better ways to avoid such.
Have had a first hand witness of some one who tried checking the baby's genotype and a healthy AA boy child was unknowingly terminated in the process.
The process for checking the genotype of a baby during pregnancy terminates a good percentage of unborn children.
Its better to completely avoid situations where we have to make the Prochoice option