"Seven of Vulcan" with a baby? If they go for that option, it depends how they handle it. Most shows, it's the "jump the shark" move. However, in Trek, they have handled it well. Looking back, Keiko has a baby, but she was not a regular character. Then in DS9, it was Kira, but the baby was...
The problem with this story is the extreme measures they take in this episode, which almost looks like a cliff hanger season ender. That's fine, this episode is better than the worst of this series, but the critical story in this season is how they resolve the extreme measures in this episode...