_ Q. How is the child engendered in the womb? A. The first six days the seed hath this colour of milk, but in the six following a red colour, which is near unto the disposition of the flesh; and then it is changed into a thick substance of blood. But in the twelve days following, this substance becomes so thick and round that it is capable of receiving shape and form.
       Q. Doth the child in the womb void excrements or make water? No. Because it hath not the first digestion which is in the stomach. It receives no food by the mouth, but by the navel; therefore, makes no urine but sweats, which is but little, and is received in a skin in the matrix, which at the birth is cast out. _

Aristotle's Book...Concerning The State Of Man's Body
Of The Head
Of The Eyes
Of The Nose
Of The Ears
Of The Mouth
Of The Teeth
Of The Tongue
Of The Roof Of The Mouth
Of The Neck
Of The Shoulders And Arms
Of The Hands
Of The Nails
Of The Paps And Dugs
Of The Back
Of The Heart
Of The Stomach
Of The Blood
Of The Urine
Of The Gall And Spleen
Of Carnal Copulation
Of The Seed Of Man And Beasts
Of Hermaphrodites
Of Monsters
Of The Child In The Womb
Of Abortion And Untimely Birth
Of Divers Matters
The Problems Of Marcus Antoninus Sanctipertias
The Problems Of Alexander Aphrodiseus