How do ponies make babies?
How do ponies make BABIES? Well that seems like a simple question to ask, since its not that hard to answer.
Since most of the show is based off human characteristics and some horse characteristics, it's only natural to think that babies come from a Stallion and a Mare loving eachother very very much while in bed. Then of course you wait like 11 months and then a baby is born!
Unless you have a different theory, this would be the simplest answer :3
EDIT: Also, they don't show things like that considering its a children's TV show. It's not like they're going to show every single detail in the episode, like how Fluttershy is actually an animal serial killer off screen.
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It's actually 9 months dude