boy
A child mare, or a baby female horse, is called a filly. The male version of this is called a colt.
The male child of a father and mother is called their son, though what they personally call him would be largely a matter of the couple's choice.
A male offspring is a son.
Niece if it's a female, and nephew if it's a male.
Hermaphrodite
Techniqually, the species itself is actually peafowl. Anyway, the male is called a peacock, the female a peahen, and the offspring peachicks. There is no specific name for a young male or young female peafowl.
Male vampires are fertile. The child of a male vampire is called a Dhampir. I have never heard of a female vampire giving birth.
The common title for a male child is 'master'.
A male foal is called a colt and they females are called fillies until there first birthday which then they become yearlings
A male parent is considered to be the father of the child in most cases. A male parent can also be a step-father or even the grandfather of the child.
male six are powerful or male
There is no way to engineer a male child, there is always a 50 - 50 chance of male or female.