Okay, let's tackle this question about the posterior border of the ovary. First, I need to recall the anatomy of the female reproductive system, specifically the ovary's borders. The ovary is a small, almond-shaped organ, and its borders are important for understanding its position and relations.

The core concept here is the anatomical structure that forms the posterior border of the ovary. The ovary has several ligaments and structures that define its borders. The anterior border is formed by the ovarian ligament, which connects the ovary to the uterus. The posterior border is different. I remember that the suspensory ligament of the ovary, also known as the mesovarium, is involved. Wait, no—the mesovarium is part of the broad ligament and contains the ovarian vessels. The suspensory ligament actually connects the ovary to the lateral pelvic wall and contains the ovarian vessels. So maybe the posterior border is formed by the suspensory ligament. Alternatively, the posterior border might be formed by the fimbriae of the fallopian tube, but the fimbriae are part of the fallopian tube, not the ovary's border.

Wait, the ovary's posterior border is adjacent to the fimbriae, but the actual border structure is the mesovarium. The mesovarium is the fold of peritoneum that connects the ovary to the broad ligament. The suspensory ligament is the one that connects to the pelvis. Let me verify: the posterior border of the ovary is formed by the suspensory ligament of the ovary, which contains the ovarian vessels. The anterior border is the ovarian ligament. So the correct answer should be the suspensory ligament.

Now, checking the options. The user didn't provide the options, but the correct answer is likely the suspensory ligament. Let me make sure. The posterior border is the suspensory ligament, while the anterior is the ovarian ligament. The mesovarium is part of the broad ligament and forms the mesentery of the ovary. So if the options included the suspensory ligament, that's the right answer. Other options might be the ovarian ligament (anterior), fimbriae (adjacent but not a border), or the broad ligament itself.

So the core concept is the anatomical structures forming the ovary's borders. The posterior border is the suspensory ligament. The other options are incorrect because they refer to different structures. The clinical pearl is to remember that the suspensory ligament is posterior, and the ovarian ligament is anterior. This is important for surgical procedures and understanding ovarian anatomy.

**Core Concept**
The posterior border of the ovary is formed by the **suspensory ligament of the ovary**, which connects the ovary to the lateral pelvic wall. This ligament contains the ovarian vessels and nerves, forming a critical anatomical landmark in pelvic anatomy.

**Why the Correct Answer is Right**
The **suspensory ligament of the ovary** (also called the lateral ligament of the ovary) originates from the lateral pelvic wall and attaches to the posterior border of the ovary. It contains the ovarian artery, vein, and lymphatics, distinguishing it from other ovarian ligaments. This structure

✓ Correct Answer: D. Free of ligament attachment