PHYSIOLOGY OF LABOR

Question 1

Phase 1 of Parturition

Answer 1

Uterine Quiescence and Cervical Softening

Question 2

Phase 2 of Parturition

Answer 2

Activation

Question 3

Treatment to promote ripening

Answer 3

Prostaglandin E2 and F

Progesterone antagonist - mifepristone

Question 4

Phase 3 of Parturition

Answer 4

Stimulation

Question 5

Phase of Parturition the corresponds to the clinical stages of labor

Answer 5

Phase 3

Question 6

Ferguson Reflex

Answer 6

cervical stretching during dilatation

Question 7

Firm during contractions, contracts, retracts and expels the fetus

Answer 7

upper segment

Question 8

Softer, distended and more passive

Answer 8

lower segment

Question 9

Physiological retraction ring

Answer 9

lower segment thinning and concomitant upper segment thickening

Question 10

Bandl ring

Answer 10

pathological retraction ring happens when thinning of the lower segment is extreme

Question 11

Most important force in fetal expulsion

Answer 11

Pushing or intraabdominal pressure

Question 12

Cervical effacement

Answer 12

obliteration or taking up of the cervix

Question 13

Leading portion of fluid and amniotic sac in front of the presenting part and formed during the process of cervical effacement and dilatation

Answer 13

Forebag

Question 14

Sigmoid curve

Answer 14

The pattern of cervical dilatation during the preparatory and dilatational divisions of normal labor

Question 15

Phases in Stage 1

Answer 15

Latent Phase

Active Phase

Question 16

Active Phase Division

Answer 16

Acceleration phase
Phase of Maximum slope
Deceleration phase

Question 17

Station

Answer 17

descent of the fetal BPD in relation to a line drawn b/w maternal ischial spines

Question 18

Hyperbolic curve

Answer 18

formed when the station of the fetal head is plotted as a function of labor duration

Question 19

Most important pelvic floor structure

Answer 19

Levator Ani

Question 20

Schultze mechanism

Answer 20

blood from the placental site pours into the membrane sac and does NOT escape externally until after extrusion of placenta

Question 21

Duncan mechanism

Answer 21

placenta separates first at the periphery and blood collects between membranes and the uterine wall and escapes from vagina

maternal surface appears first

Question 22

Phase 4 of Parturition

Answer 22

Involution