**Core Concept**
Cervical incompetence refers to a condition where the cervix dilates prematurely, leading to second-trimester pregnancy loss or preterm birth. This condition is often associated with a history of cervical surgery or trauma.

**Why the Correct Answer is Right**
The treatment of choice for cervical incompetence in a non-pregnant uterus is cervical cerclage. Cerclage involves stitching the cervix to prevent premature dilation and maintain pregnancy. This procedure is typically performed before 16 weeks of gestation. The goal of cerclage is to prevent cervical shortening and maintain the integrity of the cervix until fetal maturity is achieved.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because cervical cerclage is specifically indicated for cervical incompetence, not for other uterine anomalies or conditions.
* **Option B:** This option is incorrect because cervical suture or pessary may be used as temporary measures in emergency situations, but they are not the definitive treatment for cervical incompetence.
* **Option C:** This option is incorrect because hormonal treatments, such as progesterone, may be used to support pregnancy in cases of cervical incompetence, but they do not address the underlying cervical pathology.

**Clinical Pearl / High-Yield Fact**
Cervical cerclage is typically performed before 16 weeks of gestation to prevent cervical shortening and maintain pregnancy.

**Correct Answer: C. Cervical cerclage.**