why women aren`t serial killers. It is their inborn mentality
Of course there are female serial killers... they're usually not sex-weirdos like Bundy or Gacy.
The most common types of female serial killers are 'angels of death' (work in a 'caring' profession such as nursing or elder care and kill vulnerable patients) or 'black widows' (middle aged or elderly women who poison a series of husbands and/or suitors). There are also women who kill their children (successively, there was a famous case in Australia a few years ago*)
There are also 'team killers' who work with a man.
General physical weakness (compared to men) means women who kill don't go on physical rampages or violent abductions. They usually choose those who are even weaker (elderly, frail, children) or use poison.
Women are human beings and a tiny minority have all the same dark, violent urgers that a tiny minority of men have. Fewer chances to carry them out doesn't mean they don't exist...