I would assume it was in preparation for childbirth
ischial spine
The obturator foramen is the opening located between the pubic and ischial rami of the pelvis. It is partially covered by the obturator membrane and serves as a passageway for the obturator nerve and vessels.
Ischial tuberosity
The hamstrings muscles attach to the ischial tuberosity.
You can eventually get an avulsion fracture or separation of the ischial tuberosity or apophysis.
15940
The sciatic notch, the space between the ischial spine and ischial tuberosity in the pelvis, can be used to determine gender by its width and angle. In general, males tend to have narrower and deeper sciatic notches compared to females, whose notches are wider and more shallow. This difference is due to variations in pelvic shape and is used in biological anthropology and forensic science to assess gender in skeletal remains.
Yes
The ischial tuberosity is the part of the ischium that supports the body when seated. It is commonly referred to as the "sitting bone" and bears the weight of the body during activities such as sitting and cycling.
ischial
see link below
Ischial tuberosity