Endometrial polyps may affect conception. Endometrial polyps can have an effect on pregnancy and may cause infertility. Larger endometrial polyps that grow in the inner opening of the uterus may interfere with the entry of sperm into the uterine cavity. This affects conception. If the polyp grows at the opening of the fallopian tube, it may affect the combination of sperm and egg. Endometrial polyps that grow inside the uterine cavity may interfere with the fertilization of the egg. Even after pregnancy, the lining of the uterus is not the same as other tissues, causing insufficient blood supply, and in some cases, it is more likely to cause miscarriage and fetal arrest. When endometrial polyps are diagnosed, it is important to seek timely treatment to avoid affecting future pregnancies.