There's a bug with the new birthing system. If 2 different types finish at the same time (Fly/Fly egg or head humper/spider mother egg). The first birthing animation plays but instead of starting the next set afterwards it freezes in whatever animation you were in before the birthing started (running, standing etc)
As a sidenote I'm curious whether or not you'll be implementing stuff like bondage or tentacles and such in the future? I don't know what your interests are so I'm curious.