Common Definitions and Nomenclature
  1. Augmentation of Labor - the intentional increase in contraction frequency or intensity when contractions are already present or dilation of the cervix is occurring in order to hasten the process of labor with the goal of achieving a vaginal delivery.
  2. Cesarean Section (C/S) - the delivery of a baby by making a surgical incision through the abdomen and the uterus, thus allowing for the delivery of the baby through these incisions and not through a vaginal approach.
  3. Elective repeat Cesarean Section (ERCS) - Planned cesarean delivery in a woman who has had one or more prior cesarean deliveries. The delivery may or may not be scheduled.
  4. Home Birth After Cesarean Section (HBAC) - the delivery of a baby vaginally at a home, private residence or domicile, after having delivered previously by C/S.
    • HBAnC - (n) representing the number of previous C/S. ie. If a patient had 3 previous C/S, then HBA3C.
  5. Induction of Labor - the provoking or intentional production of uterine contractions in a previously non-contracting uterus in order to cause or "induce" labor with the goal of achieving a vaginal delivery.
  6. Labor - physiologic process during which the products of conception (ie, the fetus, membranes, umbilical cord, and placenta) are expelled outside of the uterus.
  7. Nulliparous - a woman who has never had a pregnancy go beyond 20 weeks or given birth to a viable, or live, infant.
  8. Preterm Labor - the presence of uterine contractions of sufficient frequency and intensity to cause progressive effacement and dilation of the cervix prior to term gestation (between 20 and 37 wk).
  9. Preterm Pregnancy - estimated gestational age of a baby below 37 weeks.
  10. Placenta previa - a complication of pregnancy in which the placenta grows in the lowest part of the uterus and covers all or part of the opening to the cervix. The risk of placenta previa in the general population is 1/200 pregnancies but more common in women with previous C/S. There are three types of placenta previa:
    • Marginal - The placenta is next to cervix but does not cover the opening.
    • Partial - The placenta covers part of the cervical opening.
    • Complete - The placenta covers all of the cervical opening.
  11. Placenta accreta- is a general term used to describe a complication of pregnancy in which there is an abnormally deep attachment of the placenta through the endometrium and into the myometrium (muscle of the uterus). This invasion of the placenta then becomes
  12. Placenta increta- a variant of placenta accreta with deeper penetration into the myometrium than placenta accreta.
  13. Placenta percreta- a variant of placenta accreta with complete penetration through the myometrium to the serosa and/or adjacent organs to the uterus.
  14. Postterm Pregnancy - estimated gestational age of a baby 42 weeks and beyond.
  15. Term Pregnancy - estimated gestational age of a baby between 37-42 weeks.
  16. Trial of Labor after Cesarean Section (TOLAC) - term used when a patient attempts a vaginal delivery after a previous C/S. It can either be associated with spontaneous labor or with an induction of labor.
    • TOLAC is the term used when the patient is attempting the Vaginal Birth after Cesarean Section (VBAC).
    • Therefore, a VBAC is a successful TOLAC.
  17. Unsuccessful trial of labor - Delivery by Cesarean Section in a woman who has had a trial of labor; sometimes referred to as a "failed" TOLAC.
  18. Vaginal Delivery - the delivery of a baby through the vagina, either spontaneously or with the assistance of instruments such as a vacuum or forceps.
  19. Vaginal Birth after Cesarean Section (VBAC) - the delivery of a baby vaginally after having had a previous C/S. Also known as a successful TOLAC.
    • VBAnC - (n) representing the number of previous C/S. ie. If a patient had 3 previous C/S, then VBA3C.
  20. Water Birth After Cesarean Section (WBAC) - the delivery of a baby vaginally in a water pool or tub after having had a previous C/S.
    • WBAnC- (n) representing the number of previous C/S. ie. If a patient had 3 previous C/S, then WBA3C.
Information
 
FAQs
More Articles ->