A letter.
Dear BSG Fans:
So! You want to write a fic, specifically an Adama/Roslin fic. That's laudable. I want to write fic for this particular pairing too. And you decide hey! They're in love. Of course they are! I thoroughly agree with you. And you happen to subscribe to the true love = babies school. Well, uh, okay, whatever floats your boat. And you decide that since our shared pairing is in true love, they must have babies.
Hold it right there, Sparky.
Laura Roslin is in her fifties. We've never actually been given her age, but since Mary McAwesome is a hair shy of fifty-seven, I think we can assume that Roslin's around the same age. So, call it fifty-six, fifty-seven, which means that she has almost certainly gone through menopause. You know what menopause means? It means a woman runs out of eggs, stops menstruating, can no longer concieve a child; essentially, if she hasn't already gotten pregnant, she's out of luck. Also, depending on when you set it, there may be the small matter of her having breast cancer.
We're not even going to discuss Bill Adama's massive issues with kids.
This doesn't mean that you can't write babyfic! On the contrary. I have read and even very much enjoyed Adama/Roslin babyfic (okay, one, "If Not, Winter," and that was because Roslin was as shocked as anybody else that she got pregnant, and ended up going "whatever, I'm just going to blame Baltar" which made me giggle). Just... please realize that Roslin is past menopause, and therefore, you're going to need a hell of an explanation for how* she came to get pregnant. And I'd prefer it if it wasn't all smiles and kittens afterwards, partly because Adama and Roslin are not smiles-and-kittens people, partly because I'd really like some "wtf" at the entire situation, and partly because this is BSG, people, wtf show were you watching.
Basically, think before you write.
Much love,
me
*In a broader sense. I think we all know the specifics. Wiseass.