And it also stimulates the enlargement of the memory glands, which are the glands that basically produce and secrete the milk that the child needs following childbirth. Now, let's move on to the fifth type of hormone, which is once again a peptide hormone. This is relaxant. Now, Relaxant is not only released by aroplacenta, it is also produced by the corpus luteum as well as other structures and is also produced in males now in females and during pregnancy. What relaxant does is basically serves two important functions. Firstly it increases the flexibility of the joints and ligaments found inside our pelvic region of the women which is similar to what estrogen does.