nepi-, nepio- +

(Greek: infant)

The murder, or killing, of a newborn.
The murderer of a newborn child.
Sexual arousal by infants of the opposite sex.
nepiology, neonatology
The study and science of the newborn up to two months of age postnatally.
An abnormally strong desire by a woman to have a baby.
1. Like or pertaining to the embryonic period of human development.
2. The stage of development immediately following the embryonic phase (human offspring in the early stages following conception up to the end of the eighth week, after which it is classified as a fetus).
In psychiatry, a sexual perversion in which sexual arousal and orgasm are possible only if the partner is a baby.