I get asked this a lot whenever 'The Memory Keeper's Daughter' comes up in conversation, and my simple take is: it's a novel, not a literal true story. Kim Edwards wrote a work of fiction that reads like memoir because it's so grounded in believable detail — the hospital setting, the family dynamics, and the wrenching moral choices feel lived-in.
That said, the book draws on real themes and real debates: how families respond to a Down syndrome diagnosis, the stigma people faced in earlier decades, and the very human impulse to hide mistakes. Those are all genuine, widespread experiences, which is why the story lands so hard and why some readers assume it's based on a specific true case. There are also reports that Edwards was inspired by an image and by several anecdotes she encountered while researching, but she crafted an original plot and characters rather than chronicling one family's real life.
If you want to treat it as a conversation starter about ethics and caregiving, it works wonderfully; if you're hunting for a factual biography, look elsewhere. Personally, I find the ambiguity — fiction that feels like truth — part of its power.