| a. | is advocated in primigravid patients | |
| b. | is advocated in patients who have previously had episiotomy | |
| c. | is advocated in patients who have had Caesarean section | |
| d. | is advocated in patients who have had a previous 3rd. degree tear | |
| e. | is advocated in vaginal breech delivery | |
| f. | is advocated in premature vaginal delivery to protect the fetal head |