What reproductive disorder can be present before the ability to reproduce?

Cryptorchidism, or undescended testicles, is a reproductive disorder that can indeed be present before an individual reaches the age of reproduction. This condition occurs when one or both testicles fail to descend from the abdomen into the scrotum during fetal development or early infancy. It can lead to complications later in life, particularly concerning fertility, as the elevated temperature inside the abdominal cavity can negatively affect sperm production.

In contrast, other conditions mentioned, like Turner syndrome, endometriosis, and polycystic ovarian syndrome, typically manifest at or after puberty, once the body begins to go through reproductive changes. Turner syndrome primarily affects females and is associated with a range of physical and developmental challenges but generally becomes more relevant in the context of puberty and reproductive health. Endometriosis and polycystic ovarian syndrome specifically impact individuals' reproductive health and often present symptoms or complications in the reproductive years. Thus, cryptorchidism stands out as a condition that can be identified well before reproductive capability is established.