Aristotle,
Aristotle's History of Animals
“ If the child is a male, a liquid, serum-like discharge, of a pale yellow colour, precedes; if a female, this discharge is sanguineous, but still fluid. Some women have neither during the period of parturition.2. In other animals parturition is not painful, and it is evident that they suffer but moderately in the pains of labour. In women the pains of parturition are more violent, especially in those that are inactive or that are not well made in their sides, and are unable to hold their breath. ”
