Types of pelvis

What is Caldwell-Moloy classification of types of pelvis?

Types of Pelvis -












Gynaecoid pelvis - 50 %
· Most suitable for childbirth
· Wider brim
· Ischial spines are blunt
· Sub pubic angle is 90º

Android pelvis - 20 %
· Heart shaped brim
· Anterior posterior diameter is shorter
· Transverse diameter is wider
· Childbirth is difficult

Anthropoid pelvis - 25 %
· Oval in shape
· Transverse diameter is shorter, A-P diameter is greater - more common in black women
· Seen in tall women with narrow shoulders
· Sub pubic angle more than 90º

 Platypelloid pelvis - 5 %
· Kidney shaped (Flattened gynaecoid pelvis)
· Anterior posterior diameter is smaller
· Transverse diameter is wider

See this for simple explanation .