The document discusses the Android pelvic structure according to the Caldwell-Moloy classification of female pelvis types. The Android pelvis makes up around 12% of white women and 8% of non-white women. It is characterized by a triangular or heart-shaped pelvic inlet with narrow anterior apex and converging side walls. This results in a narrow pelvic canal that can cause prolonged and painful labor. Other traits include prominent ischial spines, a narrow sacrosciatic notch, and a subpubic angle less than 90 degrees. Women with an Android pelvis may also have less developed secondary sex characteristics like smaller breasts, a harder vaginal wall, and lower libido.