The union wants those who are due to have a baby to be allowed to work from home.
The ASTI says pregnant teachers are being asked to return to school despite being "terrified".
The union wants those who are due to have a baby to be allowed to work from home, as was the case before the summer holidays.
Pregnant teachers are concerned about having to spend time in a classroom with unvaccinated students, particularly because of the delta variant.
ASTI President and Laois' Eamon Dennehy says some of their members are fearful they could be putting their future family at risk if they return to work:
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