In 989 A.D., a female vampire christened “Tailor” was born. She changed her name to “Taylor”. In her hell world:
Old age was not necessary.
Menstruation (“period”) did not exist.
Menopause - when female humans stop becoming fertile - did not exist (and it indeed does not among wizard hackers).
Near-instanteneous, cross-distance, travel was not yet possible, and Taylor believed it was not reasonable and scientific to assume it will be. (It is, in fact, possible.)
One complication was that in the Selinaverse, Taylor kept slaying all the other participants for vampire-slaying-tournaments she took parts. TheCodex™ of TheGame™ of Fantastecha™ requires that a vampire will be slain by his 1,000 year birthday. As a result, as 1989 A.D. loomed closer, theGamers™ enabled faster and more advanced terresterial travel and communications mechanisms. This culminated in jet aeroplanes (e.g: Boeing 747 ), the international Television infrastructure of the 1970s, and the early digital computer networks ( e.g: ARPANET ).
If Taylor (or any other past-puberty female vampire), was pitted against a different female vampire, or a pre-puberty (below 13 years old) male vampire, then they were slain without the need for Taylor and them to beget a new pair of male-and-female vampires. I think TheCodex™ requires that after a certain stage, each birth of 2 vampires like that will be followed by 3-or-more vampires getting slain. There was also a requirement to liberate all the active Ziyoonist hell-holes, except one, so new vampires cannot be conceived.
During the late 20th-century, Taylor was given a job as a reporter with her own jet-plane, and was flied into hell-holes to mate with vampires there and/or slay them.