What is an episiotomy?
An episiotomy is an incision through the vaginal wall and the perineum (the area between the thighs, extending from the vaginal opening to the anus) to enlarge the vaginal opening and facilitate childbirth.
During a vaginal birth, the physician/midwife will assist the fetus' head and chin out of the vagina when it becomes visible. Once the head is out of the vagina, the physician/midwife usually rotates the fetus to the side and eases the shoulders out, followed by the rest of the body.
In some cases, the vaginal opening does not stretch enough to accommodate the fetus. The physician/midwife may perform an episiotomy to help enlarge the opening and deliver the fetus. The episiotomy is usually performed when the fetal head has stretched the vaginal opening to several centimeters during a contraction. Although episiotomy was a very common procedure in the past, more recent studies have found that routine or preventive use of episiotomy does not benefit the health of mother or baby. The American College of Obstetricians and Gynecologists (ACOG) no longer recommends performing an episiotomy on a routine basis. Discuss with your physician the best treatment option for you and your baby.
An episiotomy may be classified into two types:
Midline or median - refers to a vertical incision that is made from the lower opening of the vagina toward the rectum. This type of episiotomy usually heals well but may be more likely to tear and extend into the rectal area, called a third or fourth degree laceration.
Mediolateral - refers to an incision that is made at a 45-degree angle from the lower opening of the vagina to either side. This type of episiotomy does not tend to tear or extend, but is associated with greater blood loss and may not heal as well.
After the delivery of the baby, the mother is asked to continue to push during the next few uterine contractions to deliver the placenta. Once the placenta is delivered, the episiotomy incision is sutured. If a mother does not have regional anesthesia such as an epidural, a local anesthesia may be injected in the perineum to numb the area for repair of a tear or episiotomy after delivery.
Other related procedures that may be used during labor and birth include caesarean delivery and external and internal fetal monitoring. Please see these procedures for additional information.
Reasons for the procedure
Not all women will require an episiotomy, and assisting the tissues to stretch naturally may help reduce the need for this procedure. If an episiotomy is not performed, tearing of the perineal tissues may or may not occur. An episiotomy may be used to assist in the treatment of the following conditions:
Complicated birth such as a breech presentation (bottom or feet first) or shoulder dystocia (when the fetal head has been delivered but the shoulders are trapped)
Prolonged second stage (pushing stage of labor)
Forceps or vacuum delivery
There may be other reasons for your physician to recommend an episiotomy.
Risks of the procedure
As with any surgical procedure, complications may occur. Some possible complications of an episiotomy may include, but are not limited to, the following:
Tearing past the incision into the rectal tissues and anal sphincter
Perineal hematoma (collection of blood in the perineal tissues)
Pain during sexual intercourse
Patients who are allergic to or sensitive to medications or latex should notify their physician/midwife.
If the birth of the baby occurs too rapidly, an episiotomy may not be performed.
There may be other risks depending upon your specific medical condition. Be sure to discuss any concerns with your physician/midwife prior to the delivery.
Before the procedure
Your physician/midwife will explain the procedure to you and offer you the opportunity to ask any questions that you might have about the procedure.
You will be asked to sign a consent form that gives your permission to do the procedure. Read the form carefully and ask questions if something is not clear. The consent form for an episiotomy may be included as part of the general consent for your delivery.
Notify your physician/midwife if you are sensitive to or are allergic to any medications, iodine, latex, tape, and anesthetic agents (local and general).
Notify your physician/midwife of all medications (prescribed and over-the-counter) and herbal supplements that you are taking.
Notify your physician/midwife if you have a history of bleeding disorders or if you are taking any anticoagulant (blood-thinning) medications, aspirin, or other medications that affect blood clotting. It may be necessary for you to stop these medications prior to the procedure.