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Understanding Labor and Delivery Complications -- the Basics

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What Are Common Labor and Delivery Complications?

A pregnancy that has gone smoothly can still have problems when it's time to deliver the baby. Your doctor and hospital are prepared to handle them. Here are some of the most common concerns:

Preterm Labor and Premature Delivery

One of the greatest dangers a baby faces is being born too early, before his or her body is mature enough to survive outside the womb. The lungs, for example, may not be able to breathe air, or the baby's body may not generate enough heat to keep warm.

A full-term pregnancy lasts about 40 weeks. Having labor contractions before 37 weeks of pregnancy is called preterm labor. Also, a baby born before 37 weeks is considered a premature baby who is at risk of complications of prematurity, such as immature lungs, respiratory distress, and digestive problems. 

Prolonged Labor (Failure to Progress)

A small percentage of women, mostly first-time mothers, may have a labor which lasts too long, sometimes called "failure to progress." Both the mother and the baby are at risk for several complications, including infections, if the amniotic sac has been ruptured for a long time and the birth doesn't follow.

Abnormal Presentation

"Presentation" refers to the part of the baby that will appear first from the birth canal. In the weeks before your due date, the fetus usually drops lower in the uterus. Ideally, for labor, the baby is positioned head-down, facing the mother's back, with its chin tucked to its chest and the back of the head ready to enter the pelvis. That way, the smallest part of the baby's head leads the way through the cervix and into the birth canal. This normal presentation is called vertex (head down).

Because the head is the largest and least flexible part of the baby, it's best for the head to lead the way into the birth canal. That way, there's little risk that the baby's body will make it through the birth canal, but the head will get caught.

Some babies present with their buttocks or feet pointed down toward the birth canal. This is called a breech presentation. Breech presentations are often seen during an ultrasound exam far before the due date, but most babies will turn to the normal head-down presentation as they get closer to the due date.

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