No, they can't. I think Damon from The Vampire Diaries 说 it best : "Vampires can't procreate... though we 爱情 to try." :-) But also, in Moonlight, Josef 说 to Mick: "And unless 你 and Beth figure out a way around the vampire rules of 爱情 and procreate... "
During the later part of the Moonlight season, we are told that 吸血鬼 can't have children and unless Mick and Beth find a way to rewrite the rules, they will never have any. To me that screamed out that they will indeed find a way around it. Now, that could be as easy as Mick haviong viable sperm after his brief stint as a human right before he and Beth got together 或者 there might have been some relatively unknow way of that happening to be revealed in the never filmed season two. I don't think Moonlight would have gone to so much trouble to talk about it and have Mick think he might have fathered a child with a long 以前 lover only to find he hadn't, if they weren't considering the possibility of having Beth pregnant at some point. It's certainly worth some 粉丝 fic!
No. They can't and don't even think they can because of Twilight because every vampire story is different. Like for insinsts the 吸血鬼 in vthe series Vampire Acdamey 或者 the TV series Angel. In the book series there are 3 types of 吸血鬼 but in the TV series 天使 are only one type, just like most vampire based movies, books, 或者 TV shows. Another one that has 更多 than one type of vampire is the the book series Blue Blood.