“Ovipositor” is a biology word and a toy category, and most people arrive here for the second one. An ovipositor toy is a soft hollow tube that gel eggs are pushed through, so they end up wherever the toy is. The rest of this page is the detail: the organ it’s named after, how the eggs are made, where the safety lines sit, and what to read on the spec table if you’re shopping the egg-shaped end of the shelf.
What is an ovipositor?
An ovipositor is the specialised, usually tube-shaped organ that many female insects (and some fish and other animals) use to deposit eggs somewhere useful: a grasshopper drilling eggs into soil, a parasitic wasp injecting them into wood. In some wasps the ovipositor evolved into the sting, which is a fact you can deploy at dinner parties. If you arrived from a biology search, that’s the whole definition, and the rest of this page is about adult toys.
What an ovipositor toy actually does
An ovipositor toy builds the same idea in soft platinum silicone: a hollow, flexible tube, usually sculpted as a fantasy appendage, through which soft gel eggs are pushed. The egg travels the length of the tube and is deposited wherever the toy is. That’s the whole mechanism. The appeal is part fantasy roleplay — alien, insectoid, monster-adjacent scenarios — and part the stretch-and-release sensation of an egg passing.
The category has a widely acknowledged origin: Primal Hardwere’s Splorch is generally credited as the original ovipositor toy, and other fantasy makers have since built their own. It remains a specialist corner, because a soft hollow tube that reliably passes eggs is an awkward thing to engineer.
What we hold specs for: the four makers we track don’t currently pour tube-style ovipositors. The adjacent territory they do pour is egg-shaped plugs and insertables — Strange Bedfellas’ Emme Egg and Nellen’s Egg Plug, Mr Hankey’s Assbergé Egg Plug. An egg shape gives the signature sensation of the genre, a smooth swell to a maximum girth and then a taper, without the tube mechanics. Everything egg-shaped is one filter away.
How the eggs work
The eggs are the clever part, and the part most questions orbit:
- They’re gelatine. Makers who sell ovipositors sell purpose-made moulds alongside the toy, and owners cast a fresh batch per session.
- Body heat is the mechanism. The recipes set firm enough at room temperature to be pushed through the tube, then soften and dissolve at body temperature. A vaginally deposited egg is generally worked out naturally as it dissolves.
- They’re single-use. Gelatine is organic and porous, and cannot be cleaned or sanitised. Cast, chill, use, bin the leftovers.
- Recipe discipline matters. Food-safe gelatine, clean moulds, and nothing you wouldn’t put inside a body — sugar in particular is a known bad idea for vaginal use. Makers publish their recommended recipes; follow the maker’s version.
The safety notes, plainly
We hold specs, not medical qualifications, and none of this is medical advice. Three specifics the category adds:
- Anal use needs a retrieval plan. The bedrock rule for anal toys is a flared base, and a dissolving egg has no base at all; neither does a smooth tube. Eggs anally are a considered-risk practice some people undertake, and “it dissolves eventually” is doing a lot of load-bearing work in that plan. Egg-shaped plugs with proper flared bases — that’s a filter — give much of the sensation with none of the retrieval question.
- Fresh eggs only. Gelatine is a growth medium once it’s warm and wet. One session, one use.
- The toy is the easy part. A silicone ovipositor or egg plug cleans like any other platinum-silicone toy, and the cleaning guide applies as written, with the water run through the tube as well as over it.
How to read the specs on egg-shaped toys
Egg shapes stress different numbers than shafts do, so read the table in a different order:
- Max girth is nearly everything. An egg reaches its widest point and tapers away, so that single maximum is the sensation and the fit decision at once. Convert it to a diameter and it’s often bigger across than it sounds around.
- The taper rate is the character. A long, gradual swell, like the Assbergé’s egg profile, arrives very differently from a short abrupt one at the same max girth.
- Firmness moves the difficulty more than usual. A soft egg deforms to pass; a firm one insists on its full diameter. The firmness explorer covers what the labels mean, and softer is the forgiving direction here.
- For plugs: neck and base. The neck girth is what you rest at, and the base is what makes it anal-safe. Both are in our per-size spec tables.
If the genre appeals but the sizes look intimidating, start from the beginner sizing guide and work up. Eggs included, the shelf has a gentle end.
A short glossary
The vocabulary you’ll meet around this corner of the hobby, decoded:
- Ovipositor (toy) — the hollow-tube toy that passes gel eggs; named for the biological organ.
- Egg plug — a solid egg-shaped toy on a neck and flared base; the sensation cousin that stays put and retrieves itself.
- Oviposition — the act of egg-laying, biological or roleplayed; the fantasy the whole category serves.
- Gel eggs / “ovi eggs” — the castable gelatine eggs themselves, made per session in a maker’s mould.
- Clutch — a batch of eggs deposited in one go, borrowed straight from the herpetology textbooks and used with a completely straight face.