<prompt> Lactional amenorrhea is due toProlactin induced inhibition of GnRHProlactin induced inhibition of FSHOxytocin induced inhibition of GnRHOxytocin induced inhibition of FSH  <response>: High levels of prolactin inhibits GnRH release from Hypothalamus and thus indirectly FSH and LH secretion from anterior pituitary Reference: Textbook of Gynaecology; Sheila balakrishnan; 2nd edition; Page no 27 