Definition: Peritenon is a medical term that refers to a condition where the uterus does not fully develop and function properly. This condition can be caused by various factors, including hormonal imbalances or issues with the body's ability to produce hormones necessary for pregnancy. Peritenon can lead to complications such as gestational diabetes, pre-term labor, and even birth defects if left untreated. It is important to seek medical attention immediately in cases of peritenon to ensure a safe and healthy pregnancy.