Meanings of male mammals in English

All male mammals are known to have these cells, but a long-held dogma said that females did not.

By contrast, barely 1 percent of male mammals or primates demonstrate even the slightest inclination to assist with parenting.

One reason male mammals haven't developed the ability may be that only 5 percent of mammal fathers participate in parenting.

Similar cases have been often observed in recent years, even among other male mammals (such as sheep and goats).

A similar, but still stronger, argument may be based upon the existence of teats, and even functional mammary glands, in male mammals.

In addition, the male mammals excrete a higher quantity of protein than do the females., suggesting the role of androgens in excretion of protein.