It looks like a parody. OTOH, in those days, nudes of women did not look realistic because it was forbidden to paint nudes. But you would think Leonardo would be a bit more familiar with the female anatomy, unless he was celibate or homosexual.
He WAS celibate, hence, speculation he was homosexual. I don’t buy it.
I think he painted a nude guy, and added the breasts and the hairdo.