👉 Peritrematous is a scientific term that refers to a type of reproductive system found in certain species of mammals, particularly in birds. It is characterized by the presence of one or more eggs laid within the body cavity of the female reproductive organ, which are then fertilized outside the body through the process of egg-laying. Peritrematous systems can be found in a variety of mammal species, including many avian species and some other mammals such as bats. These systems allow