催乳激素

prolactin

to urge / to press / to prompt / to rush sb / to hasten sth / to expedite

to promote lactation / to stimulate lactation (e.g. with drug)

breast / milk

to arouse / to incite / to excite / to stimulate / sharp / fierce / violent

hormone

raw silk / white / plain, unadorned / vegetarian (food) / essence / nature / element / constituent / usually / always / ever