-_- the show is about unnaturally colorful ponies, pegasi, and unicorns. There are also baby dragons whose aging can apparently be slowed down and alicorns that are thousands of years old. And they don't have any (visible) genitals. This is a kids' show.
We could also ask questions like "can ponies get terminal cancer," "do ponies use birth control pills," "are ponies created in labs," and other questions of the like, but why would you ask those questions unless you're trolling? This is a cartoon, and cartoons shouldn't be overcomplicated.