What is labor?
Labor is when the uterus contracts again and again to help the cervix open (dilate) and to thin (efface). The contractions get stronger with time. This causes the fetus to move through the birth canal. Labor usually starts 2 weeks before or after the estimated date of delivery. But no one knows exactly what triggers the start of labor.
What are the signs of labor?
Signs of labor vary from woman to woman because each woman has a slightly different labor. Some common signs of labor are:
Bloody show. A small amount of mucus slightly mixed with blood may come out of the vagina.
Contractions. Contractions (uterine muscle spasms) occurring at intervals of less than 10 minutes are often a sign that labor has started. Contractions may happen more often and get stronger as labor progresses.
Rupture of amniotic sac (bag of waters). Labor sometimes starts with amniotic fluid gushing or leaking from the vagina. Women who have a rupture of the amniotic sac should go to the hospital right away and contact their healthcare provider. Most women go into labor within hours after the amniotic sac breaks. If your labor still has not started, you may need to stay in the hospital to have labor induced. This step is often taken to prevent infections and delivery problems.
If you are not sure if labor is starting, call your healthcare provider.
What are the different stages of labor?
Each labor is different. But labor typically is divided into 3 stages:
This is the start of labor to complete dilation. It is divided into the latent phase and the active phase. Women can have very strong, painful contractions during the latent phase. The cervix opens (dilates) about 3 or 4 centimeters and thins out (effaces). Some women may not know they are in labor if their contractions are mild and irregular.
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The latent phase is when contractions become more frequent (usually 5 to 20 minutes apart) and somewhat stronger. This is usually the longest and least intense phase of labor. You may be admitted to the hospital during this phase. The healthcare provider or midwife will do pelvic exams to check the dilatation of the cervix.
The active phase is signaled by the more rapid dilatation of the cervix. It may start as early as 3 to 5 centimeters or as late as 6 centimeters. This continues until 10 centimeters. Contractions become regular, longer, more severe, and more often (usually 3 to 4 minutes apart). You often will feel the urge to push during this phase. In most cases, the active phase is shorter than the latent phase.
The second stage of labor starts when the cervix is completely opened. It ends with the birth of the baby. The second stage is often called the “pushing” stage. During the second stage, you become actively involved by pushing the baby through the birth canal to the outside world. When the baby’s head is visible at the opening of the vagina, it’s called “crowning.” The second stage is shorter than the first stage> It may take 30 minutes to 3 hours or longer for a woman’s first pregnancy.
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After your baby is born, you enter the third and final stage of labor. This is delivery of the placenta. This is the organ that has nourished your baby inside the uterus. This stage often lasts just a few minutes up to a half-hour. In this stage, the placenta passes out of the uterus and through the vagina.
Each labor experience is different. The amount of time in each stage will also vary. But most women will deliver their baby within 10 hours after being admitted into the hospital, if the labor is not induced. Labor is generally shorter for future pregnancies.
Induction of labor
In some cases, labor has to be “induced.” This is a process of stimulating labor to start. The reasons for induction vary. It is not done before 39 weeks of pregnancy unless there is a problem. Some common reasons for induction are:
You or the fetus is at risk
The pregnancy has lasted too far past the due date
You have preeclampsia, eclampsia, or chronic high blood pressure
The fetus has poor growth
Some common ways to induce labor are:
Putting medicine in the vagina (suppository) that has prostaglandin. This will stimulate contractions.
Giving an IV infusion of oxytocin or another medicine. Oxytocin is a hormone made by the pituitary gland that stimulates contractions.
Rupturing (artificially) the amniotic sac
Putting a balloon in the cervix
Care at the hospital during labor
When you arrive at the hospital in labor, the nursing staff may do a physical exam of the abdomen to determine the size and position of the fetus, and an exam of the cervix. The nursing staff may also check:
Frequency and intensity of contractions
Fetal heart rate
Urine and blood samples
IV fluids are sometimes given during labor. The IV line is a thin plastic tube put into a vein, often in your forearm. It can also be used to give medicine. IV fluids are usually given once active labor has started. You also need them if you have epidural anesthesia.
The fetus is also carefully monitored during labor. A monitor may be placed over your abdomen to keep track of the fetal heart rate.
How is pain managed during labor?
You have many choices for pain relief during labor and birth. Your healthcare provider will want to use the safest method that works best for both you and your baby.
The choice will be determined by your preference and health, the health of the fetus, and your provider’s recommendation.
The 3 main types of pain management for labor and birth are discussed below.
These measures give comfort and ease stress. These are sometimes called natural childbirth. Many women learn techniques to help them feel more comfortable and in control during labor and birth. Some of these techniques are:
Relaxation. These techniques can help you tell if you have tension and be better able to release it. They include progressive relaxation. It’s when you relax various muscle groups in series.
Touch. This may include massage or light stroking to ease tension. A jetted bath or a shower during labor may also help ease pain or tension. Ask your healthcare provider before taking a tub bath in labor.
Heat or cold therapy. This is used to help relax tensed or painful areas. It might be a warmed towel or a cold pack
Imagery. This technique uses the mind to form mental pictures that help create relaxed feelings.
Meditation or focused thinking. Meditation focuses on an object or task such as breathing. It helps direct the mind away from the discomforts.
Breathing. These techniques use different patterns and types of breathing to help direct the mind away from the discomforts.
Positioning and movement. Many women find changing positions and moving around during labor helps ease discomfort. It may even speed labor along. Rocking in a rocking chair, sitting in the “Tailor sit” position, sitting on a special “birthing ball,” walking, and swaying may be helpful . Your healthcare provider can help you find comfortable positions that are also safe for you and your baby.
These are medicines such as meperidine to ease pain. Small amounts are generally safe during labor and are commonly used with very few problems. But if given in large amounts or in repeated doses, analgesics can cause slowing of the breathing center in the brain in mothers and babies.
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These are medicines that cause loss of sensation. They are:
This anesthesia is injected in the perineal area. This is the area between the vagina and rectum. It numbs the area to fix a tear or episiotomy after giving birth.
This local anesthesia is injected into the vaginal area (affecting the pudendal nerve). It causes complete numbness in the area without affecting the contractions of the uterus. You can remain active in pushing the baby through the birth canal. It is used for vaginal deliveries.
Epidural anesthesia or epidural block
This anesthesia involves infusing numbing medicines through a thin catheter that has been put into the space that surrounds the spinal cord in the lower back. It causes loss of feeling in the lower body. Infusions of medicines may be increased or stopped as needed. This type of anesthesia is used during labor and for vaginal and cesarean (C-section) births. The most common problem of epidural anesthesia is low blood pressure in the mother. Because of this, most woman need to have an IV infusion of fluids before it is given. A risk of this anesthesia is a postpartum headache. It may develop if the epidural needle enters the spinal canal, instead of staying in the space around the canal. The anesthesiologist will discuss the risks and benefits of this anesthesia.
This is sometimes called a “walking” epidural. That’s because the medicine infused through the epidural is an analgesic. It eases pain but does not numb the body. You are able to move. Combinations of medicines may be used in the epidural, part analgesic and part anesthetic. The most common problem of epidural analgesia is low blood pressure in the mother. This type of anesthesia is used during labor and for vaginal deliveries. A risk of epidural analgesia is a postpartum headache. It may develop if the epidural needle enters the spinal canal, instead of staying in the space around the canal. Epidural analgesia may be used for pain relief in labor and for vaginal deliveries.
This anesthesia involves injecting a single dose of anesthetic medicine directly into the spinal fluid. It acts very quickly and causes complete loss of feeling and movement of the lower body. This type of anesthesia is often used for C-sections.
This involves injecting an analgesic medicine into the spinal fluid to give pain relief without numbing. It may be used in combination with epidural anesthesia or analgesia. It may be used for pain relief during labor or after giving birth.
This type of pain relief involves giving anesthetic medicine that causes you to go to sleep. It may be used in emergency C-sections.
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