5th House
The fifth house is the house of creativity, children, and pleasure: everything a person does not out of duty but because they want to.
What the House Rules
The fifth house rules creativity, romance, play, sports, entertainment, risk-taking for fun, and children.
Classical astrology also assigns gambling and speculation to it, as another form of playing with luck.
Planets in the House
The Sun in the fifth house means creative self-expression and a need for recognition. Venus means romantic infatuations. Jupiter means generosity, children, and luck in games. Saturn means difficulty with lightness: it's hard for the person to let themselves have fun, and children come late.
Sign on the Cusp and an Empty House
The sign on the cusp sets the style of pleasure: Capricorn through achievement, Pisces through art, Aries through sports and risk.
An empty fifth house does not mean childlessness, a common and mistaken conclusion. In astrology the question of children is judged by a combination of factors, and no conclusions can be drawn from a single empty house.