High Heat in Early Pregnancy

Cynthia Flynn's picture


Dear Midwife,
I am very worried about having done hot yoga during the week I conceived (Feb. 18). Approximately two days after conception (Feb. 20), I joined a Bikram yoga class, where the temperature is kept at a minimum 105 degrees for an hour and a half class. That week, I went to the class almost every day for about 8 days (Feb. 20-28) and then the following week, once (march 4). 3 days later that week (March 7)I took a pregnancy test and tested positive. I immediately stopped going to the yoga class and but now I am reading EVERYWHERE that even staying in a hot tub over 100 degrees can be dangerous for the baby during the first trimester.

I am very nervous. I think somewhere I read that heat will begin to affect the embryo from 2 weeks after conception. Is that true? Or can heat cause problems/ deformities/ impaired neural function from the moment of conception?

My first prenatal exam is weeks away and I don't think I can wait that long for an answer!


If you know you are pregnant, why is your first visit weeks away????? you should find someone who is actually going to take care of you, don't you think? Why would you settle for someone who is not doing the job?

But anyway, to answer your question, I am one of those who recommends against hot tubs during pregnancy (better safe than sorry), but there is no actual evidence that they do any harm. The baby is well-protected!

-- Cynthia, CNM. PhD.