As is well-known most murderers are men, and most murder victims are women. Much, much too many women loose their life over male sexuality and the "need" to gain sexual satisfaction. Many of these female victims are sex-workers and the male murderers - who came to them for sex - somehow seem to confuse this fact with a sick belief in their moral obligation or just "right" to kill them in an attempt to "clean up" society. It's as sick as it can be, to, so-to-speak, "drain the swamp", etc., etc. by removing these women whose job it is to give the sexual satisfaction sought by their killers. Women, on the other hand, murder for money or feelings of love turned hatred, but not to gain sexual satisfaction. They don't rape their victims which very, very often happen in male-murdering-women-murders.
I, for one believe that many more female murderers get away with their crimes than is known. Very often they don't use weapons that leaves a tell-tale mess which is what men do. No, many murderous women resort to poison which may not be detected at a glance like e.g. knife wounds. It has been the custom not to see women who murder several people as serial-killers. Somehow this appellation has been reserved for men, but there are female serial-killers - and maybe even more than we think. One of them is the Japanese Chisako Kakehi (born 1946), who was convicted for murdering four men, but who presumably killed at least seven others. She was arrested in 2014 when a routine autopsy revealed cyanide in the body of her dead husband.
At first she denied any responsibility, but in 2017 she confessed the murder which she said happened out of a deep-rooted hatred of her husband. Two days later she retracted her confession, even denying any remembrance of it. Her lawyers tried to make a case for her being demented and not responsible for her actions, but that didn't work well with the judge: She received a death warrant, but there hasn't been set a date of her execution yet. Actually she will only be informed that her sentence is being carried out on the morning of her execution which to me looks very cruel. I don't know if that's because she is a woman who in some ways has behaved like a male man, but there hasn't been that many executions in Japan so maybe she isn't going to have "a date with the executioner?
https://www.unodc.org/documents/data-and-analysis/gsh/Booklet_5.pdf