Uterine Horn

Definition - What does Uterine Horn mean?

A uterine horn is the part of the uterus that connects to each fallopian tube.

If one or both of the fallopian tubes do not properly connect with the respective uterine horn, subfertility or infertility could result.

FertilitySmarts explains Uterine Horn

Each end of the uterus has a uterine horn that allows for the egg to flow from each fallopian tube to the uterus. Alternatively, sperm can travel from the vaginal canal, up to the uterus and through the uterine horn to enter the fallopian tubes where it has the potential to meet with a mature egg.

An improper connection or blockage of a single uterine horn can mean that ovulation is occurring, but an egg is only released every other month. Blockages of both horns means that while ovulation is occurring, eggs are unable to flow from the fallopian tubes into the uterus.

Intrauterine devices (IUDs) function by blocking the horns of the uterus to prevent the egg from passing into the uterus. If the egg is unable to pass into the uterus, it will be reabsorbed by the body.


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