Hi, Thanks for the query. Cataflam contains diclofenac potassium. Usually it is used to decrease pain and inflammation. It belongs to category D drugs in pregnancy according to FDA. Means if used during pregnancy, that may harm the baby. So, if you are using the tablet for analgesic purpose, you can shift to better alternative. Paracetamol group of drugs belongs to category B. You can choose them with your doctor s advice. Cataflam may not directly affect the fertility. After undergoing tubal flushing, the possibility of pregnancy can increase in some women. So, in next month track the ovulation and plan intercourse around that period. This will increase the possibility of pregnancy. Take care.