Level 1: Reasons for miscarriage in one month of pregnancy There are many reasons for miscarriage in one month of pregnancy, the most common of which is abnormal embryonic development. After the fertilized egg implants, if the embryo develops abnormally, it will lead to miscarriage. In addition, endometriosis, malformations, immune problems, etc. may also lead to miscarriage in the first month of pregnancy. Level 2: Natural Abortion and Artificial Abortion. Abortion in the first month of pregnancy is divided into two methods: natural abortion and artificial abortion. Spontaneous abortion is when the body