Diminished egg quality Age Premature ovarian failure (POF) Not ovulating / poor quality ovulation Polycystic ovarian syndrome (PCOS) Stress / excessive weight loss Intense athletic training Blocked or damaged fallopian tubes Usually from sexually transmitted diseases (STDs) Abnormalities of the Uterus Fibroids Polyps Adhesions (scar tissue) Absent uterus Endometriosis Pelvic scar tissue (“adhesions”) Provided By Dr. Samuel Wood of Gen 5 Fertility, a world-class fertility clinic located in San Diego, California. You can learn more about infertility and IVF treatments, Dr Samuel Wood and Gen 5 Fertility on their website.