Pharmacology

What They Are

Copulins are NOT steroids — they are a mixture of short-chain volatile fatty acids (C2-C6) found in vaginal secretions. This makes them fundamentally different from every other molecule in this wiki. While pheromone steroids (androstanes, androstenes, etc.) are detected via VNO and are non-volatile, copulins are highly volatile organic acids detected primarily through the olfactory system (nose). The name comes from "copulate."

Detection

Detected via olfactory system (main nose) and possibly VNO. Unlike steroid pheromones which are often subconscious, copulins have a strong conscious smell (fatty, cheesy, vinegar-like) due to their volatility. The short carbon chains (C2-C6) make these among the most volatile pheromone compounds — they readily evaporate and travel through air.

Biological Production

Produced by Lactobacillus bacteria in vaginal flora. Production peaks during ovulation and correlates with fertility. The specific ratio of the 6 fatty acids changes with the menstrual cycle, potentially encoding fertility status information.

Overview

Copulins are a mixture of short-chain fatty acids found in vaginal secretions — not a single molecule but a blend of acids that varies with the menstrual cycle, peaking during ovulation.

In the pheromone community, synthetic copulin blends are used primarily by women targeting men or occasionally by men as "priming" agents. The PheroTruth community has debated copulins extensively, with threads ranging from "Copulins are fake" to "Copulin Crazy Vixens" and discussions on ovulation timing.

Composition

The copulin blend consists of:

Fatty Acid Carbon Chain CAS Notes
Acetic acid C2 64-19-7 Dominant acid
Propionic acid C3 79-09-4
Isobutyric acid C4 79-31-2
Butyric acid C4 107-92-6
Isovaleric acid C5 503-74-2
Isocaproic acid C6 646-07-1

Relative proportions shift throughout the menstrual cycle, with peak "fertility blend" occurring during ovulation.

Scent Considerations

Raw copulins smell distinctly fatty, cheesy, or "funky". This is why:

  • Commercial products are heavily diluted
  • A cover fragrance is absolutely necessary
  • Application location matters (covered areas preferred)
  • Despite the smell, the effects work subconsciously even when consciously masked

Cycle Variation

Natural copulin production varies with the menstrual cycle:

Phase Copulin Level Effect
Follicular Low Minimal
Ovulation Peak Maximum attraction signal
Luteal Declining Reduced
Menstruation Low Minimal