Reproductive disorders are diseases involving the reproductive system, including reproductive tract infections, congenital abnormalities, cancers of the reproductive system and sexual dysfunction.Uterine fibroids are the most common noncancerous tumors in women of childbearing age. Fibroids are made of muscle cells and other tissues that grow in and around the wall of the uterus, or womb. The cause of fibroids is unknown. Risk factors include being African-American or being overweight.The reproductive system is a collection of internal and external organs — in both males and females — that work together for the purpose of procreating, according to the Cleveland Clinic. Due to its vital role in the survival of the species, many scientists argue that the reproductive system is among the most important systems in the entire body.