Q:

Non-medical or slang synonyms for female reproductive organs

I am basically writing an intercourse scene between two characters in a medieval-like setting, so the tone of the book is slightly medieval as well. Now, while I have found plenty of synonyms for the male body parts, I'm having difficulties with the female ones. For some reason, all synonyms in the English language for "vagina" sound rather off-putting. 
I cannot use "vulva" because it sounds too clinical (same with "vagina"). "Womb" makes me think of motherhood (which is the last thing I want to come to the readers' minds while reading these scenes) or animals. "Gash" sounds like it would be better used to describe flesh wounds. "Hole" sounds very ominous and generic. Other words like "pussy" or "c*nt" are too slang-ish, even offensive. And euphemism like "love cave" or "Cupid's hole" or anything along those lines sound very childish and even humorous. I was considering "slit" for a while but even that brings slang to mind. I was even considering some sort of milder euphemisms, such as "the wetness between her thighs" but they have already been used in other similar works so I'd rather not.
Just to clarify, I don't need a synonym for a particular part of the female genitalia, just for it as a whole.
Any suggestions?

A:

You might try an authentically medieval English word or two. Chaucer’s Wife of Bath boasts of her own at line 608 of her Prologue:

I hadde the beste quoniam myghte be.

Elsewhere (e.g., Merchant's Tale, line 2061), Chaucer quibbles on queynte as (a) curious, odd, arcane, and (b) female pudendum (cognate with cunt); at Miller’s Tale 3276–77 he uses these two meanings separately, rhyming the word with itself. Queynt is also a variant reading for quoniam or quonyam in the Wife of Bath’s boast.

A:

Many sources (e.g., here) argue a tight connection between visual similarity of various foods to genitals and the aphrodisiac effect thereof; some even claim that the visual similarity sourced the popular belief in the effect.
One of the most notorious examples is the oyster: across ages and cultures, it is believed to be an aphrodisiac, among other things, because of the visual resemblance and the many alluring connotations of the shell.
This must have been on Shakespeare's mind, too, I think, when he cheerily put 

Why, then the world ’s mine oyster,
  Which I with sword will open.

into The Merry Wives of Windsor.
By the way, a feminist view of why it is awkward to find just the right term for an occasion is offered here. Further inspiration might be found there, too. Muff, for example, appears to be attested from the 1690s. Not mediaeval, of course, but still with a reputable history.
I do hope I got the gist of the question right. When saying female reproductive organs, you weren't thinking about the ovaries, were you?

A:

If you are looking for a word that is neither too clinical nor too raunchy, the word sex can be used as a euphemism for genitals, male or female. Womanhood can be used if you want something specifically feminine. Both of these are often used in the more explicit kinds of romantic fiction.

