Flor, what has been reported is of course "forced family planning".
And the principle is not asking the teachers to postpone or plan their pregnancy but....
"The principal convened a meeting of teachers recently and told those who were married not to get pregnant"......
If this was in contract/rule, she wouldn't have needed to say that.
Also, .......
"the principal has refused to let pregnant woman teachers continue in their jobs".......
So what would be justification of sacking the pregnant teachers?