Is he also a pediatrician? [Karev sighs. He gets it. But that's no answer, so he's stuck being both doctor and Alex Karev.]
You're asking the right guy, don't get me wrong. But I don't know what you want - me to tell you all the medical crap and arrange something or tell you what I know personally. Even if you can have kids, doesn't mean you can... Perfectly healthy, never-dead... Well okay, she freakin' died once but I'm using her as an example anyway - struggle to have kids for years. Sometimes they don't get to, naturally. But there's invitro, there's adoption...