What is colostrum? How the milk production hormonally regulated?

Explanation

The first milk comes from the mammary glands
of the mother just after parturition for few days is called colostrum. It contains several antibodies (mainly IgA), that provide passive immunity to the new-born baby. The secretion and storage of milk generally begins after birth of young one, usually within 24 hours under the influence of hormone prolactin secreted by anterior lobe of the pituitary gland. The ejection of milk is stimulated by the hormone oxytocin released from the posterior lobe of the pituitary gland.