Milk and blood are what is left over from nutriment.

Periods generally harmonise for the embryo and its nutriment; and again nutriment tends upwards to milk and the nourishment of the baby.

Inanimates get life, animates get life, the parts of animates get life.

The natures of all are untaught.

Blood of another is useful, one’s own blood is useful; blood of another is harmful, one’s own blood is harmful; one’s own humours are harmful, humours of another are harmful; humours of another are beneficial, one’s own humours are beneficial; the harmonious is unharmonious, the unharmonious is harmonious; another’s milk is good, one’s own milk is bad; another’s milk is harmful, one’s own milk is useful.