Most common uterine anomaly is :
**Core Concept**
The question is testing the knowledge of uterine anomalies, specifically the most common type. Uterine anomalies are congenital malformations of the uterus that can be classified into several types, including unicornuate, bicornuate, septate, and didelphic uterus. The most common type is associated with a specific embryological development of the Müllerian ducts.
**Why the Correct Answer is Right**
The correct answer is the septate uterus, which is the most common type of uterine anomaly. It occurs due to an incomplete resorption of the septum that separates the two Müllerian ducts during embryological development. This results in a uterus with a thin, fibrous septum that can cause menstrual irregularities, infertility, and an increased risk of preterm labor. The septum can be identified on ultrasonography or hysteroscopy.
**Why Each Wrong Option is Incorrect**
**Option A:** Unicornuate uterus is a rare type of uterine anomaly where one side of the Müllerian duct fails to develop, resulting in a single, smaller uterus. It is not the most common type.
**Option B:** Bicornuate uterus is a type of uterine anomaly where the uterus is divided into two horns, but the septum is not as thin as in a septate uterus. It is less common than the septate uterus.
**Option C:** Didelphic uterus is a rare type of uterine anomaly where the uterus is completely divided into two separate uteri, each with its own cervix. It is not the most common type.
**Clinical Pearl / High-Yield Fact**
The septate uterus is often associated with a history of recurrent miscarriages, infertility, and menstrual irregularities. It is essential to diagnose and treat this condition early to prevent long-term complications.
**Correct Answer: B. Bicornuate uterus.**