Spontaneous abortion and miscarriage are synonymous terms. In medical literature, spontaneous abortion is most often used, while in clinical practice and among the general population miscarriage is the preferred term. Spontaneous abortion or miscarriage is defined as the involuntary end of pregnancy before 20 weeks of gestation. Recurrent pregnancy loss (RPL), also known as recurrent miscarriages, is defined by the consecutive loss of two or more pregnancies with the same partner and having no more than one living child. The aim of this review is to highlight the most common Etiology of Recurrent spotonus abortion.