Fetal Orientation in Utero

Question 1

The pelvis is constructed of 4 bones: 
1
2
3
4

Answer 1

ileum superior-laterally,
ischium inferior-laterally,
pubis anteriorly, and the
sacrum and coccyx posteriorly

Question 2

The pelvis is held by which joints

Answer 2

It is held together by the following 4 joints:

bilateral sacroiliac joints, the symphysis pubis, and the sacrococcygeal joint

Question 3

The pelvis is divided by the______into the false pelvis above and the
true pelvis below.

Answer 3

linea terminalis

Question 4

The_____ is bordered by lumbar vertebrae posteriorly, by the iliac fossa laterally, and by the abdominal wall anteriorly

Answer 4

false pelvis

Question 5

The _____ is a bony canal formed by

posterior sacrum and coccyx, lateral ischial, and anterior pubis

Answer 5

true pelvis

Question 6

_____is the classic female pelvis and is found in 50% of women

This pelvis is spacious for the fetal
head to pass through.

Answer 6

Gynecoid shape

Question 7

____is the typical male pelvis and is found in 30% of women

This pelvis is restricted at all levels.

Arrest of descent in labor is common

Answer 7

Android shape

Question 8

_______found in 20% of women. The

inlet is larger anterior-posteriorly with side walls that converge. Subpubic arch is narrow

Answer 8

Anthropoid shape

Question 9

Anthropoid shape assessment

Answer 9

The fetal head engages anterior-posteriorly, often in occiput posterior position,
making delivery difficult.

Question 10

_____is like a flattened gynecoid.

It has straight side walls with deep sacral curve and wide subpubic arch.

Answer 10

Platypelloid shape

Question 11

Platypelloid shape Assessment:

Answer 11

The fetal head engages transversely and delivers occiput transverse position

Question 12

Orientation of the long axis of the fetus to the long axis of the uterus

Answer 12

Lie

Question 13

The most common lie is ______

Answer 13

longitudinal

Question 14

Portion of the fetus overlying the pelvic inlet.

Answer 14

Presentatio

Question 15

The most common presentation is ______

This is 96% of fetuses at term

Answer 15

cephalic.

Question 16

Types of breech

–_______ means thighs are flexed and legs extended. This is the only kind of
breech that potentially could be safely delivered vaginally.

– ______ means thighs and legs flexed.

– _______ means thighs and legs extended

Answer 16

Frank breech

Complete breech

Footling breech

Question 17

______more than one anatomic part is presenting (e.g., head and upper extremity)

Answer 17

Compound

Question 18

Relationship of a definite presenting fetal part to the maternal bony pelvis.

It is expressed in terms stating whether the orientation part is anterior or posterior, left or right

Answer 18

Position

Question 19

The most common position at delivery is ______

Answer 19

occiput anterior

Question 20

Different Positions

• ____ with a flexed head (cephalic presentation)
• ______ with a breech presentation
• Mentum (chin): with an extended head (face presentation

Answer 20

Occiput:

Sacrum:

Question 21

Degree of extension-flexion of the fetal head with cephalic presentation

Answer 21

Attitude

Question 22

The most common attitude is _______

Answer 22

vertex.

Question 23

• ____ head is maximally flexed
• ____: head is partially flexed
• ____ head is partially extended
• _____: head is maximally extended

Answer 23

Vertex:
Military
Brow:
Face