Derek: I love you and you love me. And whatever happens, I don't care. I don't want to know. I mean it. I don't want to know.
Meredith: Well the lab already has my blood so..
Derek: Here's what we're gonna do. No more doctors, no more labs. You and I we have a lot of sex. Maybe we make a baby, maybe we do not. Maybe you get Alzheimer's, maybe you do not. Just screw the odds, screw science. Let's just live. Whatever happens. Happens. Me and you. Okay?