Bicornuate uterus is due to :
**Core Concept**
A bicornuate uterus is a congenital uterine anomaly characterized by a heart-shaped uterus with two rounded horns. This condition occurs during fetal development due to incomplete fusion of the Müllerian ducts.
**Why the Correct Answer is Right**
The formation of a bicornuate uterus is attributed to the failure of the Müllerian ducts to fully merge and form a single, unified uterus. Normally, the Müllerian ducts develop from the paramesonephric ducts and eventually fuse to form the uterus, cervix, and upper part of the vagina. In cases of bicornuate uterus, this fusion is incomplete, resulting in the characteristic heart-shaped appearance.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a bicornuate uterus is not caused by an abnormal development of the cervix or vagina.
**Option B:** This option is incorrect because a septate uterus is a different type of congenital uterine anomaly, characterized by a thin septum of tissue dividing the uterus.
**Option C:** This option is incorrect because a unicornuate uterus is a congenital anomaly where one Müllerian duct fails to develop, resulting in a single, smaller horn.
**Clinical Pearl / High-Yield Fact**
In cases of bicornuate uterus, patients may experience difficulty conceiving, preterm labor, and an increased risk of miscarriage.
**Correct Answer: C. Unicornuate uterus.