## Core Concept
The development of the ovary involves a complex interplay of genetic, hormonal, and environmental factors. It begins with the formation of the genital ridge, which eventually gives rise to the ovaries in females. The process involves the migration and differentiation of primordial germ cells.

## Why the Correct Answer is Right
The correct answer, ., relates to the fact that the ovaries develop from the genital ridge and are influenced by the absence of a specific gene or factor that leads to testicular development. In the absence of SRY (sex-determining region Y) gene expression, which is crucial for testis development, the genital ridge develops into ovaries. This process is supported by the presence of certain genes and the influence of hormones.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it likely suggests a detail that contradicts established embryological facts about ovarian development, such as the role of specific genes or the timeline of development.
- **Option B:** This option is incorrect as it may propose a mechanism or origin that does not align with current understanding, such as suggesting the ovaries develop from a different embryonic structure.
- **Option C:** This option is incorrect because it probably presents a misleading or inaccurate statement regarding the genetic or hormonal control of ovarian development.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the development of ovaries is primarily driven by the absence of testis-determining factors, notably the SRY gene. This leads to a default pathway resulting in ovarian development. Understanding this concept is crucial for grasping disorders of sex development.

## Correct Answer: D.