🐒
Sealed Shut Until Mating Season
Mouse lemurs and dwarf lemurs develop a membrane that seals their vaginal opening completely closed outside of breeding season.
Mouse Lemur
Microcebus
The world's smallest primates, mouse lemurs have unusual reproductive adaptations including seasonal vaginal closure.
Vital Stats
🏷️ TypePrimate (strepsirrhine lemur)
🌍 Found InMadagascar — tropical and subtropical forests
📏 Size9-14cm body, 30-80g
⏳ Lifespan6-8 years in wild, up to 15 in captivity
🔞 Sexual Maturity1-2 years
💕 Mating SystemPromiscuous — scramble competition among males
📅 Mating SeasonSeptember - October (austral spring)
🤰 Gestation54-68 days
👶 Offspring1-4 per litter
🍆 Penis Size1 cm
⏱️ Sex Duration30 seconds
🔬 Notable AnatomyFemales develop a vaginal closure membrane outside of breeding season
⚖️ Sexual DimorphismMinimal; males have larger testes relative to body size