I thought her thinking was "I will be unable to have a child when I get out of prison". Which makes some sense. Preventing my someone from procreating seems like a serious punishment not warranted in this case.
They don't yet cyrofreeze convicts, you can get pregnant while in prison although I suspect you must be on work-detail or some other revenue generating activity for the prison to approve your visitations.
I mean, sure, technically. It seems far better to have a baby right before you go into prison then in prison though. The experience of being pregnant is probably horrible, and certainly giving birth unchained. Then when the baby comes you get to breastfeed if that's something you want to do and hold your baby for more than 10 minutes. And I guess in 11 years it means you missed like 5th grade graduation, but other than that it's not like 10 vs 11 is super relevant.