Which fascia layer covers the posterior portion of the prostate?

Denovillier's Fascia is the correct choice because it specifically covers the posterior aspect of the prostate gland. This fascia acts as a barrier that separates the prostate from the rectum, and it is significant in surgical contexts, particularly in procedures like prostatectomy. Its relevance is highlighted in the anatomical relationships in the pelvis, which is crucial for minimizing complications during surgery.

The other fascia layers mentioned do not pertain specifically to the posterior aspect of the prostate. For example, the Fascia of Waldeyer generally refers to a more comprehensive layer involving the pelvic support structures without a direct association to the prostate. The transversalis fascia is involved in the abdominal cavity and does not directly interact with the prostate. Urogenital fascia is related to the anterior structures of the urogenital system rather than the posterior. Therefore, Denovillier's Fascia is uniquely positioned as the layer that specifically covers the posterior portion of the prostate.