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Oxytocin and Prolactin are the hormones produced during breastfeeding that work together to make milk, establish a letdown, and keep up with the supply and demand of a nursing infant.
During the luteal phase, both E2 and progesterone regulate secretion of the two gonadotrophins, while inhibin A plays a role in FSH secretion. The intercycle rise of FSH is related to changes in the levels of the steroidal and non-steroidal substances during the luteal-follicular transition.n terms of the positive feedback mechanism, E2 is the main component sensitizing the pituitary to GnRH. Activity of a non-steroidal ovarian substance, named gonadotrophin surge-attenuating factor (GnSAF), has been detected after ovarian stimulation. It is ...