Ashtangasamgraha 1.25

1.25

By them residing in the semen and menstrual fluid at the beginning of conception, as with poison in a poisonous insect,
three separate constitutional types arise: inferior, middling, and superior.
[It is] for seven nights after the appearance of the menstrual flower.
Then, one desiring a son should unite on the eighth, tenth, or twelfth night;
one desiring a daughter, on the fifth, seventh, or ninth.
Among these [nights], later and later there is an increase in the child's lifespan, health, sovereignty, good fortune, strength, complexion, and faculties;
thereafter, however, there is only a progressive decrease of lifespan and the rest.
With Hasta, relief occurs on the seventh, or in Citrā on the eighth.
And in fasting, one should consider knowledge of the twofold therapeutic approach.
Or buttermilk cooked with that, together with honey and rock salt;
or one should eat that flesh together with jaggery and roasted meat.
And from drinking from a breast that is not squeezed out and excessively filled with milk, cough, dyspnea, fever, and vomiting arise due to over-unctuousness.