So either they found a way for Naruko to last 9 months, just for THIS, or that's less a baby and more a ton of fluid, and those "x-rays" are actually speech bubbles with guys chanting "get pregnant" for no apparent reason. Wishful thinking, perhaps.
I'm not since it's slowly picking up on the slack left by doujin and artists doing gender bender stuff and taking the poof route instead of a full on sequence. It still baffles me that it was an AI artist that finally did a tgtf thing for beast boy turning into beast girl.