Does the baby's sex influence the mother's immune system? A new study investigates the link between fetal sex and the mother's immune.
You can see this done occasionally by the fish in a boy's aquarium. The bird places in a tiny opening or pouch in the mother bird the fluid (semen), which, like the.
Studies in The Psychology of Sex Havelock Ellis small children ask where babies come from they are told the mother gets them from the well. In the bird - house he pointed to the stork: “Now, boys, there's the bird that brings the babies.