S3L2: Four Main Shapes of Pelvis

Question 1

What are the 4 main shapes of a female pelvis?

Answer 1

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Question 2

Intro

Female type (Most common variety)

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 2

Gyencoid Pelvis

Question 3

Intro

Male type pelvis

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 3

Android Pelvis

Question 4

Intro

Ape like pelvis

● Gynecoid
● Anthropoid
● Platypelloid
● Android

Answer 4

Anthropoid Pelvis

Question 5

Intro

Flat pelvis and the least common variety

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 5

Platypelloid Pelvis

Question 6

RELATIONSHIP OF TRANSVERSE DIAMETER TO AP DIAMETER OF INLET

Transverse diameter of
inlet is slightly bigger than
AP diameter

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 6

Gynecoid Pelvis

Question 7

RELATIONSHIP OF TRANSVERSE DIAMETER TO AP DIAMETER OF INLET

Transverse diameter is > AP

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 7

Android Pelvis

Question 8

RELATIONSHIP OF TRANSVERSE DIAMETER TO AP DIAMETER OF INLET

The only pelvis with AP
diameter > transverse
diameter

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 8

Anthropoid Pelvis

Question 9

RELATIONSHIP OF TRANSVERSE DIAMETER TO AP DIAMETER OF INLET

Pelvis with a Transverse
diameter&raquo_space;> (much more
than) AP diameter

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 9

Platypelloid Pelvis

Question 10

Suprapubic angle

90°

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 10

Gynecooid Pelvis

Question 11

Suprapubic angle

<90°

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 11

Android Pelvis

Question 12

Pelvic Sidewall

Straight and parallel

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 12

Gynecoid Pelvis

Question 13

Pelvic Sidewall

Convergent

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 13

Android Pelvis

Question 14

Pelvic Sidewall

Narrow

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 14

Anthropoid Pelvis

Question 15

Pelvic Sidewall

Divergent

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 15

Platypelloid Pelvis

Question 16

Obstetric Outcome

Normal female pelvis.
No difficulty in engagement.
Most common position of head: Left occiput transverse /Left occiput anterior

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 16

Gynecoid Pelvis

Question 17

Obstretic Outcome

Engagement is delayed and Deep transverse arrest/persistent occipito-posterior position common

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 17

Android Pelvis

Question 18

Obstetric Outcome

Diameter of engagement is AP diameter

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 18

Anthropoid Pelvis

Question 19

Obstetric Outcome

Direct occipito-posterior
position is M/C

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 19

Anthropoid Pelvis

Question 20

Obstretic Outcome

Nonrotation is common

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 20

Anthropoid Pelvis

Question 21

Obstretic Outcome

Head engages in
transverse diameter with
marked asynclitism.

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 21

Platypelloid Pelvis

Question 22

Obstretic Outcome

Engaging diameter is supersubparietal diameter
(18.5cm) instead of usual
biparietal diameter (9.5cm)

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 22

Platypelloid Pelvis

Question 23

Type of Delivery

Normal delivery

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 23

Gynecoid Pelvis

Question 24

Type of Delivery

Difficult instrumental
delivery

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 24

Android Pelvis

Question 25

Type of Delivery

Face to pubes delivery

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 25

Anthropoid Pelvis

Question 26

Type of Delivery

If head is able to negotiate the inlet by means of asyncliticism,
then normal labor, otherwise, cesarean section

● Gynecoid
● Arthropoid
● Platypelloid
● Android

Answer 26

Platypelloid Pelvis

Question 27

T/F:

The engaging diameter in Platypelloid Pelvis is biparietal diameter (9.5 cm) instead of usual
supersub parietal diameter (18.5 cm)

Answer 27

False

Engaging diameter is supersub parietal diam
(18.5cm) instead of usual biparietal diam (9.5)

Question 28

T/F

The cavity of the true
pelvis in female is broad, shallow, and has a greater capacity

General structure and functional modifications

Answer 28

True

The cavity of the true pelvis is narrow and deep in MALE PEVIS.

Question 29

Modified T/F

A. The female pelvis is tilted less forward as it is adapted for child bearing
B. The male pelvis is titlted forward because it is adapted for support of a male’s heavier build and stronger muscles

General structure and functional modifications

Answer 29

FF

Female - Titled forward
Male - Titles less far forward

Question 30

Modified T/F

A. The bone thickness of female pelvis is lesser compared to males
B. Additionally, their bones have markings that are more prominent compared to males

Bone thickness

Answer 30

TF

Markings are more prominent in male pelvis

Question 31

Modified T/F

A. The bones of female pelvis are lighter thinner and smoother
B. The bones of male pelvis are heavier and thicker

Bone thickness

Answer 31

TT

Question 32

Modified T/F

A. The acetabula in female pelvis are smaller and closer
B. The acetabula of male pelvis are larger and farther apart

Acetabula

Answer 32

FF

Female: smaller and FATHER APART
Male: larger and CLOSER

Question 33

Modified T/F

A. The angle of female pelvis is Broader (80° to 90°); more rounded
B. The angle of male pelvis is more acute (50° to 60°)

Angle/Arch

Answer 33

TT