The study, conducted at Harvard University in Cambridge, Massachusetts, used two species of mice: the deer mouse and the oldfield mouse.

Researchers created a behavioral assay to track the behavior of both males and females of each species.

It also measured how often they engaged in parental behavior such as building nests and licking and huddling their pups.

The data found that the females of both species were attentive mothers but the same didn’t hold true for the males.