Ah, well, I'm more on the loving, consensual, not-at-all fatal side of things. Almost completely vanilla apart from unbirth, actually, which is somewhat inconvenient, because you never see any unbirth stuff that doesn't come with a side of, say, furry futa cockvore.
You might find this interesting:
goblinpunch.blogspot.com/2017/05/wombs-and-witch-kites.html
>The part of the uterus that collects the incipient soul is called the perimetrium. This is why different sexual positions can affect the nature of the resultant creature--different positions affect the sacred geometry of the perimetrium, which likewise affects the characteristics of the souls it is able to attract (or retain).
>For example, it is known that those conceived in the rear mount position are predisposed towards shamelessness, vandalism, and scurvy. This is why the Church discourages it.
>There is even the chance of entrapping 'souls' that are not human souls at all, and are incompatible with the other souls and tissues. These are spirits, demons, angels, and all the sundry pseudofauna of the ethereal plane. Accidental incorporation is the prime cause of stillbirths and birth defects, and it is why such things are quickly burned and buried.
>More than any of the body's organs--except for the brain--the uterus touches on the ethereal plane.
>A uterus is an immensely powerful tool in the hands of a witch. Like all tools, it can be turned from its original purpose (receiving godly souls sent by Zulin) and towards darker intentions. It can be a net used to capture spirits. It can be a sieve to sift through them. It can even be a garrote, or a scalpel.