North American Registry of Midwives (NARM) Practice Exam

Which pelvic variant is more commonly seen in women of color?

1. Android

2. Gynecoid

3. Anthropoid

4. Platypelloid

The correct answer is: Anthropoid

The anthropoid pelvis is characterized by its elongated shape, which is wider in the front and narrower in the side, facilitating a more oval shape. This pelvic variant is more commonly observed in women of color, particularly within certain ethnic groups. One explanation for this prevalence may relate to genetic and evolutionary adaptations to environmental pressures, as the anthropoid pelvis may offer certain advantages in terms of childbirth in specific populations. In contrast, the gynecoid pelvis is known as the classic female pelvis, known for its rounded shape that tends to facilitate childbirth and is not as distinctly associated with specific ethnic groups. The android pelvis, resembling a male pelvis, features a heart-shaped inlet and is generally less favorable for vaginal birth. The platypelloid pelvis, which is flattened and has a wider transverse diameter than anteroposterior diameter, also does not show a significant correlation with specific ethnicities. Overall, while several pelvic types exist, the distinction of the anthropoid variant among women of color is linked to both anatomical and demographic factors that highlight its prevalence.