The endometrium plays a very important role in conception and pregnancy in women. Every month, under the influence of female sex hormones, the endometrium thickens to prepare to receive a fertilized egg. If there is no fertilization, the endometrium will peel off and cause menstruation. However, in some cases, due to insufficient hormones or some other cause, the endometrium thickens and vice versa, making it difficult for the embryo to attach, leading to miscarriage. Let's learn more about what a thick endometrium is in the following article.