Can Buffy Vampires have Babies?

No, they talked about it in season two. I think in the episode where Kendra shows up.

No, the Vampires in the Buffy-Verse can't reproduce. I think they can but only when the Higher Powers think they should. Like Angel and Darla.

No they can't the only reason that Angel and Darla could reproduce was because of the Shamsho profercy even thou it was later discovered that the profercy was re-written.

YES SHE CAN

Yes vampires on Buffy can have babies, on the spun off show Angel, Angel and Darla have a son named Connor.

Since a vampire is technically a re-animated corpse and in addition to having 'no living seed', he has no blood flow, then he can not have an erection, which means no, he can not impregnate a human female, let alone have intercourse with her. There is no folklore evidence of a female vampire being able to either since she is a re-animated corpse as well with no living viable eggs so even if either could 'mate' with a human or another vampire, no combination of the two would produce an offspring NO MATTER HOW YOU TRY TO GET AROUND IT. So, the romantic notion of the vampire is really just that, a notion. The only 'penetration' going on is with their fangs!