Types of pelvic

 pelvic is divided in to 4 types according to the shape of the brim.

1. Gynecoid - 

it is normal female pelvic. this type of pelvic seen in 50% females. 

INLET

Shapes - Round 

anterior posterior segments - almost equal and spacious.

CAVITY 

Sacrosciatic notch - wide and shallow

Sidewall - straight or slightly divergent .

OUTLET

ischial spines - not prominent

pubic arch - curved

subpubic angle - wide 

Bituberous diameter -  Normal 

2. Anthropoid - 

INTEL 

shape - anterior posterior oval 

anterior and posterior segment - both increased with slight anterior narrowing.

CAVITY

sacrosciatic notch - more wide and shallow 

side wall - straight or divergent 

OUTLET

ischial spines - not prominent

pubic arch - long and curved 

subpubic angle - slightly narrow 

Bituberous diameter - normal or short.

3. Android 

INLET

shape - triangular, Heart shape 

anterior and posterior segment - posterior segment short and anterior segment narrow

CAVITY

sacrosciatic notch - narrow and deep

sidewall - convergent

OUTLET

Ischial spine - prominent

pubic arch - long and straight

subpubic angle - narrow 

Bituberous diameter - short

4. Platypelloid 

INLET

shape - transversely oval

anterior and posterior segment - both reduced flat

CAVITY

sacrosciatic notch - slightly narrow and small

sidewall - divergent

OUTLET

ischial spines - not prominent 

pubic arch - short and curved 

subpubic angle - very wide (more than 90)

Bituberous diameter - wide