Oxytocin causes the expression of stored milk ; prolactin orders more .

催产素产生贮存的乳汁；催乳素催发出更多的乳汁。

Oxytocin is all about bonding .

催产素对于感情依恋至为重要。

Could oxytocin be the key ?

那么催产素能是关键吗？

Estrogen actually amplifies oxytocin production .

雌激素实际上促进了催产素的分泌。

When the mother is feeling healthy and happy , she produces oxytocin .

当母亲感到健康快乐时，她会产生催产素。