Revelations - S5-E22
Heimdall: As a race, the Asgard reproduce exclusively through a process of enhanced cellular mitosis.
Samantha Carter: Are you serious? You have no other means of propagation?
Heimdall: No.
Jack O'Neill: Carter?
Carter: They're clones, sir. All of them.
O'Neill: Ah. Well, that answers a few questions.
Heimdall: In fact, for nearly a thousand years we have been physically incapable of achieving cell division through meiosis.
O'Neill: [Confused, looks at Carter] Hmm?
Carter: [Whispering] Sexual reproduction, sir.
O'Neill: Ah. [To Heimdall] A thousand years?
Heimdall: It is usually not something we discuss with other races.
O'Neill: This I understand.
Chosen answer: It's never actually mentioned on the show, though in the 'Continuum' universe, she says she's been with Ba'al for 50 years.
MoonFaery ★