does anyone have story similar to babymaker by rachel ross- with teen pregnancy?
Not having read that story I'll just focus on the teen pregnancy part.
I imagine https://storiesonline.net/a/Lubrican has hundreds of them, most of his stories entail pregnancy so just look at the codes.
In https://storiesonline.net/s/63941/the-proposition the teen is already pregnant when the story starts.
The same author has https://storiesonline.net/s/63787/when-you-know-you-know which is his continuation of a Lubrican story, I can't remember having read it.
Different author again, https://storiesonline.net/s/46917/making-the-most-of-our-second-chances has the teen already pregnant when the story starts.
I seem to remember https://storiesonline.net/s/49407/falling-for-my-step-sisters also has a teen pregnancy.
https://storiesonline.net/s/45231/my-first-christmas has a birth scene, the girl is already pregnant at the start of the story (Premier Only).
https://storiesonline.net/s/46316/a-friend-in-need is another story where the girl is already pregnant at the start of the story.