If you are oviparous, your kid is in an egg
But if you’re viviparous, he comes out from ‘tween your legs
Now, if you’re histotrophic, then your baby ate his brothers
But women with placentas are called hemotrophic mothers
If you’re ovoviviparous, then you’re pregnant with your eggs
(Predicting when they’ll hatch is not the simplest thing to gauge)
And platypuses, I might add, are oviparous mammals
Which saves them from gestation (up to 16 months for camels!)
Now if you’re viviparous, there’s four types of uteri…
And if all this overwhelms you, I suggest you be a guy.
