My thoughts about abortion are in the previous post. So here are some Twilight fan fiction stories that deal with the issue of abortion, adoption, what makes a family. There are others. These four are ones I've reread a few times and highlight different aspects of the whole issue.
1. Meeting Myself by AMomWhoWrites: One lie sealed his fate. He couldn't look back and he couldn't move on, but what happens when he finds out, sixteen years later it was all a lie... All human, canon couples, plus other characters. This is a completed story.
This is at times a gut wrenching story. It deals with teenage pregnancy, abortion, adoption, drug addiction, foster care, still birth, truth / lies, love / marriage, family coming together. Suggest having tissues handy. Warnings are given for possible triggers in chapters.
2. All Roads Lead Straight Back to You by bashfulbellawannabe: When a secretly pregnant Isabella walked out of Edward's life 4 years ago, he thought he's never see her again...
All human, not complete. The first few chapters deal with Edward finding out why Isabella left and that he has a son.
Kind of shows what can happen if the father is left out of the equation in a different manner than Meeting Myself does.
3. While You Were Knocked Out Cold by Melolable: On his way to propose to long time girlfriend Tanya, Edward witnesses an horrific hit and run car accident. The driver's plea changes everything for Edward...
All human, canon couples, complete
Yes it has a While You Were Sleeping vibe to it. I include it on this list to show, sperm donor doesn't make you a father.
4. Full Circle by JenRar: Edward left Bella to keep her safe. Not all monsters are immortal, and fate usually gets its way, no matter how hard you fight it. ...
Vampires and humans and wolves. Complete but needs a sequel or more epilogue.
Child is result of rape and we read of Bella's thoughts and feelings about keeping it or not. Another one where sperm donor doesn't make you a father.