@NotaNuffian Female Hyena have something similar to that and if you know anything about Hyena birth they kinda split, like a banana.
Also I like Dr Nova way of explaining how mpreg would work, were there's a cloaca in the butt that kind of opens up when it's time for the baby to arrive.
The video is on iron mouses channel called "Viewers Made Ironmouse the most Unhinged Presentations" if your curious. I only know this because some vtuber talk about this all the time btw.