Hi, so I'm writing a fantasy/sci fi story and I've been stuck on this piece of research/character development for a long time, so I was wondering if anyone could help me solve this or figure out a better idea. So basically in my novel there's humans and another humanoid species which we can refer to as elves for now and I want my human MC to have part elf DNA in her so she can have some of their characteristics but not be a hybrid. In my story, my MC's mother is a biologist and I want my MC to get her DNA from one of her mother's patients but also have genetics from her father so here comes the tricky part. (Method 1) I've looked up third party reproduction and my best bet was with Spindle Transfer where you take the nuclear DNA from an egg cell (human) and transfer that DNA into another egg cell (elf), and then be fertilised with human sperm. (I know very technical and sciency) Therefore my MC would be considered human but have the DNA of eleven. Sounds like I've figured it out but my predicament is that the mother's patient is a guy, so you can't exactly put the nucleus in another egg cell because guys don't have egg cells. However, my other idea (Method 2) was that since elves have accelerated healing from their blood, I could just have the mother ingest her patients' blood multiple times from when she was wounded and that could have mutated her egg cells and could be in her blood stream, when she conceived. Therefore, my MC has a mutated gene which allows her to have characteristics of an elf. But I kind of technically want the patient to be kind of a third party parent so with my second method would that be true? So my questions are; which method is better and more believable? Is there a way like my first method that I get the patient's DNA into my MC before birth? Or should I just go with my second method? Thank you if you have read through my long predicament and I would appreciate any feedback.