I remember in 7th grade, my bff and I asked the music teacher 4 times over the course of that year if she was pregnant. The first 3 times she wasn't.
But the 4th time, she was!
So glad she didn't get annoyed with us. We were so nosey!
I would ask a union steward or someone from the School Dept if there is some problem w/ letting the children know. If not, then I'd ask the principal to stop badgering me...and I would make the announcement or not make the announcement as I saw fit.
What year is this -- 1952???