Vaginal delivery

Abstract

Vaginal delivery refers to the birth of offspring in mammals or babies in humans, through the vagina, also known as the “birth canal”. It is the natural method of birth for most mammals excluding those which lay eggs. For women who deliver vaginally, childbirth progresses in three stages: labor, delivery of the baby and delivery of the placenta. There are two types of vaginal delivery: Unassisted vaginal delivery and assisted vaginal delivery. In the later, this assistance can vary from use of medicines to emergency delivery procedures. The following types of vaginal delivery have been noted; (a) Spontaneous vaginal delivery (SVD) (b) Assisted vaginal delivery (AVD), also called instrumental vaginal delivery (c) Induced vaginal delivery and (d) Normal vaginal delivery (NVD), usually used in statistics or studies to contrast with a delivery by cesarean section. Delivery of a full-term newborn occurs at a gestational age of 37–42 weeks, usually determined by the last menstrual period or ultrasonographic dating and evaluation. Nearly 80% of newborns are delivered at full term while approximately 10% of singleton pregnancies are delivered preterm and 10% of all deliveries are post-term.