Poultry Judging Practice Test

During normal ovulation, along which part does the follicular membrane rupture to prevent hemorrhaging?

1. Follicle

2. Stigma

3. Ovary

4. Oviduct

The correct answer is: Stigma

The stigma is the specific area of the follicular membrane where rupture occurs during ovulation in poultry. This rupture at the stigma is crucial because it enables the release of the mature ovum from the follicle. The design of the follicle and its associated membranes is such that the stigma acts as a weak point. When ovulation occurs, the pressure within the follicle increases, and the stigma provides a targeted site for the rupture to happen, thus preventing unnecessary trauma and subsequent hemorrhaging that could result from a more widespread rupture. A well-controlled rupture at the stigma not only facilitates the passage of the ovum but also helps to minimize blood loss, ensuring the health of the ovarian tissue and optimizing the chances for further ovulation cycles. This mechanism is essential for maintaining the reproductive efficiency of poultry. Understanding the role of the stigma highlights its importance in the reproductive process and the physiological adaptations that have evolved to support successful ovulation.