**Core Concept**
The term "cochleate uterus" refers to a specific type of uterine anomaly characterized by a longitudinal septum or division of the uterus, resembling the shape of a snail shell or cochlea. This congenital anomaly is a result of an abnormal development of the Müllerian ducts during embryogenesis.

**Why the Correct Answer is Right**
The cochleate uterus is a rare uterine anomaly that results from the incomplete fusion of the Müllerian ducts. This results in a uterus with a longitudinal septum, which can lead to various reproductive and obstetric complications, including recurrent miscarriages, preterm labor, and difficulties in conceiving. The presence of a septum can also cause the cervix to be bifid or duplicated, leading to potential complications during delivery.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the specific type of uterine anomaly known as a cochleate uterus.
**Option B:** This option is incorrect because it is a different type of uterine anomaly, known as a unicornuate uterus, which results from the failure of one of the Müllerian ducts to develop.
**Option C:** This option is incorrect because it is a description of a normal uterine shape, and does not accurately describe the specific anomaly known as a cochleate uterus.

**Clinical Pearl / High-Yield Fact**
It is essential for obstetricians and gynecologists to recognize and diagnose uterine anomalies, including the cochleate uterus, as they can lead to significant reproductive and obstetric complications. Early diagnosis and counseling are crucial for patients with uterine anomalies to ensure they receive appropriate care and management.

**Correct Answer: D. Uterus with longitudinal septum.**