What is an Anthropoid Pelvis?
The term
anthropoid in the context of gynecology refers to one of the four basic types of female pelvis shapes. The other three types are
gynecoid,
android, and
platypelloid. The anthropoid pelvis is characterized by its oval shape, where the anteroposterior diameter is greater than the transverse diameter.
Features of an Anthropoid Pelvis
The anthropoid pelvis is elongated and has a narrow pelvic cavity. The sacrum is longer and more curved than in other pelvis types, and the pelvic inlet is oval with a large anteroposterior diameter. The ischial spines are less prominent, which can facilitate vaginal delivery.Prevalence and Demographics
The anthropoid pelvis is less common than the gynecoid pelvis, which is the most typical shape for childbirth. It is more frequently observed in women of African descent. Knowing the type of pelvis can help obstetricians anticipate potential challenges during childbirth.How Does an Anthropoid Pelvis Affect Childbirth?
The shape of the pelvis plays a crucial role in
labor and
delivery. An anthropoid pelvis can be advantageous because its shape often allows for easier passage of the baby through the birth canal. However, the elongated shape can sometimes lead to a longer labor compared to a gynecoid pelvis.
Clinical Assessment
Determining the type of pelvis can be done through a
pelvic exam or imaging techniques like an
X-ray or
MRI. During a pelvic exam, the obstetrician will assess the shape and size of the pelvic inlet and the prominence of the ischial spines.
Management During Labor
Knowing the type of pelvis can help in planning the management of labor. For an anthropoid pelvis, the focus might be on monitoring the progress of labor more closely and being prepared for potential interventions, such as the use of
forceps or
vacuum extraction, if labor does not progress as expected.
Other Pelvic Types
It is important to understand how the anthropoid pelvis compares to other pelvic types: Gynecoid Pelvis: The most common type, round in shape, and ideal for childbirth.
Android Pelvis: Heart-shaped and more common in males, can make vaginal delivery challenging.
Platypelloid Pelvis: Flat and wide, can also pose challenges for vaginal delivery.
Conclusion
Understanding the characteristics of an anthropoid pelvis and its implications for childbirth is essential for healthcare providers. Proper assessment and management can help ensure a safer and more efficient delivery process.
