Definition: In mammalian biology, intermammillary is a concept that refers to the exchange of hormones between the mammary glands and the placenta during pregnancy. The intermammillary process involves the exchange of hormones like progesterone, luteinizing hormone (LH), follicle-stimulating hormone (FSH), and prolactin throughout the life cycle from the mammary gland to the placenta. These hormones are crucial for the development, growth, and maintenance of the fetus