## **Core Concept**
Ovarian pregnancy is a rare type of ectopic pregnancy where the fertilized egg implants in an ovary. The diagnostic criteria for ovarian pregnancy are crucial for distinguishing it from other types of ectopic pregnancies and for guiding appropriate management. These criteria are based on the anatomical and pathological characteristics of ovarian pregnancy.

## **Why the Correct Answer is Right**
The correct answer, . , refers to the following diagnostic criteria for ovarian pregnancy:
- The fallopian tube on the affected side must be intact.
- The gestational sac must occupy the position of the ovary.
- The sac must be connected to the uterus by the ovarian ligament.
- The ovarian tissue must be confirmed in the wall of the gestational sac.

These criteria help differentiate ovarian pregnancy from other ectopic pregnancies, ensuring accurate diagnosis and treatment.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option does not accurately represent the widely accepted diagnostic criteria for ovarian pregnancy.
- **Option B:** Similarly, this option does not align with the established criteria, which emphasize the integrity of the fallopian tube, the location of the gestational sac, its connection to the uterus, and the presence of ovarian tissue in the sac wall.
- **Option D:** This option is also incorrect as it does not specify the correct combination of criteria used for diagnosing ovarian pregnancy.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that ovarian pregnancy often presents with symptoms similar to those of other ectopic pregnancies, such as abdominal pain and vaginal bleeding. However, the specific diagnostic criteria must be carefully evaluated to confirm the diagnosis. The rarity of ovarian pregnancy (about 1 in 50,000 pregnancies) makes it a challenging diagnosis to consider but critical for clinicians to recognize.

## **Correct Answer:** .