Still,if we considered vampires as undead creatures,it should be like Van Helsing (the movie):they´d give birth to dead children.But it´d be impossible anyway,as a)females don´t have the blood to create the placenta and b)males wouldn´t have any sperm left.Unless we´re talking about venom sperm

I remember that I thought,"what kind of doctor are you?"when I reached that part.My own mind replied soon after:"a doctor who was created by someone who has no clue about biology".I also noticed how Bella stayed quiet after hearing the explanation,but then I thought that one of the traits of Mary Sues is exceeding at everything (even if she deems herself as clumsy and stupid)or,better said,seem that they know about everything when it might not be true,such as in this case.That´s another of the laughable issues:how to portray a "nerd" character and failing.But I suppose that´s what happens when you don´t deal well with using the first person while writing.