Image Source || Owner || License CC0
More similar than you think
Lots of people claim we descended from apes, wrong! The correct way of saying it is that "we (the apes and us) descended from the same ancestor". Now I'm not gonna delve on that as its not the reason you are reading this, but the reason why I brought it up is that time and time again we learn more about how similar we are with our distant cousins.
I've come across certain "credible resources" that Pregnancy Pills also work on Cornelia and to some extent certain animals as well.
The main reason behind the pills working with apes as well is because of our similar genetic make up (take note similar not identical) and so with hormones like estrogen and the like, certain pills would also work.