Hi, I understand your concern. Yes moderate rise of temperature for first 48 hours after embryo transfer is normal. It is due to progesterone that are given along with the procedure. It is also supposed to be due to immunological reaction after transfer.Paracetamol/ tylenol can be take to get relief. But if the temperature is not controlled within 48 hours, doctor s consultation becomes essential. .. for treating possible infection with proper antibiotics. Hcg testing for confirming pregnancy is done after one week of transfer. Thanks.