The Govt of India, Ayush mantralaya (Health ministry) has advised pregnant women to stay away from sex and meat. Many consider such advice inapt. It is also not known whether this is from medical viewpoint or moral. Some doctors opine that sex is okay in early stage of pregnancy but should be avoided in advanced stage. How far the advice for non veg diet is apt is a matter of dispute.
https://in.yahoo.com/news/indias-advice-pregnant-women-shun-meat-lust-derided-022802563.html