I am a primary teacher and went back full-time after DC1 was born. It took us 3 years to have a baby and a miscarriage on the way so am afraid I don't see how teachers can possibly plan when they will conceive.
Or anyone for that matter! Unless you are incredibly lucky!
We were very fortunate to conceive very quickly when we were ttc DC2, having DC1 seemed to sort out my endemetreosis. ( I don't think this is the correct spelling but brain dead now)
I had very bad SPD with this pregnancy and could barely walk. Physio wanted me in hosp for bed rest but it wasn't an option with a toddler although I'd have loved it! I didn't have 1 day off with this condition although I sat at home every night, crying with the sheer pain and frustration.
I found out I was pg in November so was there till the end of term, on crutches for the last 2 months and in a great deal of pain/discomfort. My friend had to help me get dressed when she came to look after DC1.
I decided to go back 4 days a week after DC2 was born as my DH works at the weekend and I just felt I couldn't work full-time then look after 2 toddlers on my own at the weekend.
I'm no spring chicken!
I STILL have SPD although DC2 is 2 and a half. I can hardly walk just now.
People's circumstances can change and why shouldn't teachers put their own families first?? I love my job, I work hard and am committed to it, but since I had my own children, THEY are my priority.
My class have the benefit of a different teacher with different skills/qualities etc and I come back refreshed.
When my 2 go to school, I just want them to be happy, have friends and do their best. After 20 years of teaching, this is what most parents ask about at Parents' Night!
I think spidookly has said some outrageous things. I was 21 when I became a teacher, I'm 44 now. My life has changed totally since then. Primary teaching is a JOB! It pays the bills! Yes, you have to be committed to it, but it's not the be all and end all. Well, not to me, anyway.
Nor to 2 relatives who were HT's. They both had a full life outside school and were extremely successful. An article was written in a national newspaper about one of them a few years ago.
(incidentally, the same one ended up with quite bad depression after 30 years of pastoral care of her staff. As she said, " One minute, I've got someone in here crying because they have broken up with their husband, and I support them, then the next, I have a meeting with the Director about attainment levels and targets!")