If it's a fixed term contract you will get your maternity pay if you've worked for long enough - which it sounds like you will have done. They don't have to continue your contract, pregnant or not, and I guess being away from work when it's up for renewal wouldn't help your chances of it being renewed. I'm on a fixed term contract and ttc (but have been ttc for years so not expecting to succeed really). My head knows I'm ttc as I've had IVF but I have no idea whether she'd have me back after having a baby - not quite brave enough to have that conversation. You might have more chance of keeping your job if you were prepared to come back at the school's convenience rather than your own e.g. at the start of the next academic year but when your baby arrives work may seem less important. If you're young enough (under 30) I'd ty to get a permanent post before ttc. I'm only doing it because I'm too old to leave it.