How female Mallard ducks evolved vaginal anatomy to control insemination
By
Mieke Roth
Summary
This article describes the anatomical adaptations of the female Mallard duck's reproductive tract, which has evolved to give females control over insemination. Male ducks frequently attempt forced copulation, but the female's vaginal structure has dead-end passages that make forced insemination difficult. Only 3% of duck inseminations result from forced copulation. When a female willingly mates, she uses muscle contractions to facilitate successful insemination. The article references an 8-year-old 3D model of the reproductive tract.
Source
bskyHow female Mallard ducks evolved vaginal anatomy to control inseminationmiekeroth.comKey quotes
· 4 pulledMale ducks are notorious for attempting 'forced copulation' with females.
So females have evolved vaginas that make it hard for a male duck to actually inseminate them, if they don't want it to, by forcing it towards the dead ends.
Only 3% of duck inseminations come from forced copulation.
When a female does want to mate with a male, she will contract and relax internal muscles that scientists think help make sex easier.
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