Hello and thanks for your query. I shall make an effort to provide you with good professional recommendations specific to your questions. It is cephalosporin antibiotic, are used in pregnancy to treat infections. I have not found it causing miscarriage. Cephalexin has been assigned to pregnancy category B by the FDA. Animal studies have failed to reveal evidence of fetotoxicity or teratogenicity. There are no controlled data in human pregnancy. However, the drug has been used in various stages of pregnancy without evidence of fetal harm. Cephalexin should only be given during pregnancy when need has been clearly established. Yet again, I duly appreciate your query to me, I do hope that you have found something useful to help you and I shall be glad to answer any further apprehensions. Sincerely,