Foetus

"In three months the fœtus is nearly three inches long, and weighs about three ounces. Hippocrates says, that it is at this time the motion of the male fœtus begins to be felt by its mother; but that those of the female are not felt till after the fourth."

"Yuri (voice-over): At four and a half months a human fetus has a reptile's tail – a remnant of our evolution. You can fight a lot of enemies and survive but if you fight your biology you always lose."