Testosterone levels of those fathers with higher prolactin levels drop an average of 30 percent and make them less likely to stray from their partners, more compassionate and less competitive. (thetoddle.com)
(One study suggests higher prolactin levels helps dads be more attentive to infant cries.) (businessinsider.com)
This abrupt withdrawal of progesterone in the presence of high prolactin levels cues Lactogenesis II (copious milk production). (kellymom.com)