Preterm contractions are one of the most difficult situations for a pregnant woman to cope with. First, is the stress of wondering if the contractions are labor contractions, uterine irritability, or just Braxton Hicks contractions. Second, we know that preterm contractions are overtreated in the United States, yet we don’t have really good tools for determining when treatment is necessary and when it is not. Third, none of our interventions for preterm contractions–with the exception of steroids to mature the baby’s lungs–has really been proven effective. It is a frustrating situation for both mother and provider.
Many women will have preterm contractions–also called Braxton Hicks contractions–which can be frequent and regular for periods of time. Keep in mind that while most preterm contractions do not lead to premature labor and birth, it is unwise to simply ignore them until you know that they are not leading to labor. This does not mean, however, that you need to rush to the hospital with the first contractions you feel. Some steps you can take when you experience contractions prior to 37 weeks of pregnancy:
1. The vast majority of the time, contractions that are causing cervical dilation will be regular, 10 minutes or less apart, and progressively getting stronger and lasting longer. They may be felt in the back, lower abdomen, or occasionally in the thighs. While many women will experience regular Braxton-Hicks contractions which may be close together, they do not get progressively stronger and longer, as real labor contractions do. If you are feeling contractions, change your activity for a half hour and see if the contractions change, too. If you have been active and on your feet, lie down or take a warm bath. If you’ve been lying down, get up and move around a little, or sit in a comfortable chair for a while.
2. Drinking a large glass of water may help if you are dehydrated.
3. A warm bath or shower can relax contractions.
Real labor contractions are rarely stopped by any of these measures. So if you think it’s the real thing, what types of intervention might you expect at the hospital?
1. IV fluids: these are fairly routine, even though the Cochrane Review states that IV fluids are not beneficial in stopping labor unless the woman is dehydrated.¹
2. A fetal fibronection test (FFN) and vaginal cultures for bacterial vaginosis and group B strep. The Cochrane Review did not find the FFN to be beneficial in predicting/preventing preterm labor², nor did they find treatment of bacterial vaginosis to prevent preterm labor.³ Another review, however, indicated that screening and treatment of lower genital tract infection may be helpful in prevention and preterm labor.4
3. Tocolytics will likely be given. Tocolytics are drugs that relax the muscle of the uterus, calming preterm contractions. The Cochrane Review states that there is not evidence supporting the benefit of tocolytics beyond the first 48 hours of preterm labor. The benefit of using them in the first 48 hours is allowing time to administer corticosteroid medication to the mother in order to mature the baby’s lungs, an evidence-based beneficial intervention.5 Tocolytics have all been shown to have potential adverse side effects to both mother and baby, but continue to be routinely used, simply because we don’t have any better treatment at this time.
4. The mother will likely be placed on bedrest. This is not an evidence-based intervention. Most providers continue to use it in order to “feel like we’re doing everything we can”. In other words, it’s more of a liability protection, rather than something that will truly benefit mother and baby. Yes, most women will experience more contractions when they are moving around, but contractions triggered by activity are most often Braxton Hicks contractions. Bedrest has not been shown to prevent true preterm labor from occuring.
5. If preterm labor is due to a problem with shortening/dilating of the cervix too soon, a purse-string type of stitch can be placed in the cervix, tying it closed. This is done under anesthetic and has been shown to be beneficial in preventing preterm labor, but only in cases which were caused by what is termed “incompetent cervix”. This term refers to a cervix which thins out and then dilates, often painlessly, prematurely.
What then, can be done to preserve the normal process of labor and birth if one is experiencing contractions? I would recommend the following steps, if you have not experienced a premature birth before:
1. After following the suggestions above, changing activity, drinking water, etc., if contractions are continuing to be regular and noticeably stronger and lasting longer, call your provider.
2. At the hospital, there should be no need for IV fluids unless you are dehydrated and unable to drink water.
3. Before accepting treatment with tocolytics, ask for two cervical exams one to two hours apart, and performed by the same person. Preterm labor cannot be diagnosed in the absence of cervical change. If your cervix is not dilating, you are not in labor, regardless of how many contractions you are feeling.
4. If you do have cervical change, or if your first cervical exam indicates premature changes, tocolysis for the first 48 hours is evidence based. A popular tocolytic, Terbutaline, probably has more perceptible side effects for the mother than Nifedipine, which is also used for tocolysis. If I were in premature labor, I would prefer to take Nifedipine first before using Terbutaline.
5. Accept two injections of betamethasone, 24 hours apart. This has been shown to improve outcomes for infants born early.
6. Bedrest has not been shown to improve outcomes or halt premature labor. A reasonable amount of rest is desirable, but you should be able to have light activity.
7. After 48 hours, consider discontinuing tocolytics, even if you have contractions when you stop them. Many, many women have taken tocolytics until their 36th week of pregancy, only to go overdue in their pregnancy. This indicates that many women are taking tocolytics unnecessarily, while running the risk of the side effects that can go with them. Have your provider monitor your cervix periodically for changes, and as long as your cervix is not changing prematurely, you don’t have to worry about contractions. A partner may also be taught how to check the cervix in the case of a woman who has lots of contractions. Cervical exams should not be performed without discretion, however, as they can trigger contractions if not done very gently.
8. If you do have premature labor and birth, there is no evidence that c-section is better than vaginal delivery for a premature baby. There is strong evidence that the premature infant is benefited by delayed cord clamping. Talk with your provider early in the process, requesting this be done for your baby.
9. While not often practiced in the United States, Kangaroo Mother Care is a marvelous way of humanizing preterm birth and neonatal care. While most neonatal intensive care units do not allow touching or physical handling of the premature infant, Kangaroo Mother Care has shown benefit from skin-to-skin contact with even micro-premies (the very smallest babies). I encourage you to visit their website and read their stories and evidence for this practice. Being aware of this information ahead of time will empower you to be able to advocate for yourself and your baby.
Frequent contractions which are not changing the cervix can be uncomfortable, annoying, and frustrating for the woman experiencing them. One remedy I have found effective is WishGarden Herbs Welcome Womb, an herbal tincture designed to calm an “irritable” uterus. In addition to the tincture, resting when you can and keeping a positive attitude are helpful in getting you through those difficult days or weeks.
1. Intravenous fluids for treatment of preterm labor. Retrieved 02/25/2010 from: http://www.cochrane.org/reviews/en/ab003096.html
2. Fetal fibronectin testing for reducing risk of preterm birth. Retrieved 02/25/2010 from: http://www.cochrane.org/reviews/en/ab006843.html
3. Antibiotics for treating bacterial vaginosis in pregnancy. Retrieved 02/25/2010 from: http://www.cochrane.org/reviews/en/ab000262.html
4. Antenatal lower genital tract infection screening and treatment programs for preventing preterm delivery. Retrieved 02/25/2010 from: http://www.cochrane.org/reviews/en/ab006178.html
5. Antenatal corticosteroids for maturing fetal lungs. Retrieved 02/25/2010 from: http://www.cochrane.org/reviews/en/ab004454.html