The lesser pelvis, also known as the pelvic inlet, is a complex structure that plays a pivotal role in human anatomy. This region consists of the bones, muscles, and ligaments that connect the lower limbs to the torso. It's an essential structure for human reproduction, as it covers the birth canal and supports fetal growth during pregnancy. Other common synonyms for the lesser pelvis include the pelvic brim, pelvic inlet, pelvic cavity, pelvic outlet, pelvic floor, and pelvic diaphragm. The diverse terminology reflects the complexity of the region, highlighting the importance of this structure in everyday life.