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Pregnancy and fetal non-stress test: here's what to expect during fetal non-stress test in Pregnancy

Harkandemic91
By Harkandemic91 | self meida writer
Published 7 months ago - 588 views

A non-stress test is a common prenatal test used to check on a baby's health. During a non-stress test, the baby's heart rate is monitored to see how it responds to the baby's movements.

The term "non-stress" refers to the fact that nothing is done to place stress on the baby during the test.

Typically, a non-stress test is recommended when it's believed that the baby is at an increased risk of death. A non-stress test may be done after 26 to 28 weeks of pregnancy. Certain non-stress test results might indicate that you and your baby need further monitoring, testing or special care.

A non-stress test is a noninvasive test that doesn't pose any physical risks to you or your baby.

Why it's done

A non-stress test is used to evaluate a baby's health before birth. The goal of a non-stress test is to provide useful information about your baby's oxygen supply by checking his or her heart rate and how it responds to your body's movement. The test might indicate the need for further monitoring, testing or delivery.

Normally, a baby's heart beats faster when he or she is active later in pregnancy. However, conditions such as fetal hypoxia when the baby doesn't get enough oxygen can disrupt this response.

Your health care provider might recommend a non-stress test if you have:

• A multiple pregnancy with certain complications

• An underlying medical condition, such as type 1 diabetes, heart disease or high blood pressure during pregnancy

• A pregnancy that has extended two weeks past your due date (post-term pregnancy)

• A history of complications in a previous pregnancy

• A baby who has decreased fetal movements or possible fetal growth problems

• Rh (rhesus) sensitization — a potentially serious condition that can occur, typically during a second or subsequent pregnancy, when your red cell antigen blood group is Rh negative and your baby's blood group is Rh positive.

• Low amniotic fluid (oligohydramnios)

Your health care provider might recommend having non-stress tests once or twice a week — and occasionally daily — depending on your health and your baby's health.

Risks

A non-stress test is a non invasive test that poses no physical risks for you or your baby. The term "non-stress" refers to the fact that nothing is done to place stress on the baby during the test.

While a non-stress test can offer reassurance about your baby's health, it can cause anxiety, too. A non-stress test might suggest that a problem exists when there is none, which can lead to further testing. Reassuring results also aren't predictive of the future.

Also, keep in mind that while a non-stress test is often recommended when there's an increased risk of pregnancy loss, it's not always clear if the test is helpful.

How you prepare

A non-stress test typically requires no special preparation.

What you can expect

A non-stress test is usually done in your health care provider's office.

Before the procedure

You'll have your blood pressure taken before the non-stress test begins.

During the procedure

During the non-stress test, you'll lie on a reclining chair. You'll have your blood pressure taken at regular intervals during the test.

Your health care provider or a member of your health care team will place a sensor around your abdomen that measures the fetal heart rate.

Typically, a nonstress test lasts 20 minutes. However, if your baby is inactive or asleep, you might need to extend the test for another 20 minutes — with the expectation that your baby will become active — to ensure accurate results. Your health care provider might try to stimulate the baby by placing a noise-making device on your abdomen.

After the procedure

After the non-stress test is complete, your health care provider will likely discuss the results with you right away.

Results

Results of a non-stress test are considered:

• Reactive. Before week 32 of pregnancy, results are considered normal (reactive) if your baby's heartbeat accelerates to a certain level above the baseline twice or more for at least 10 seconds each within a 20-minute window. At week 32 of pregnancy or later, if your baby's heartbeat accelerates to a certain level above the baseline twice or more for at least 15 seconds each within a 20-minute window, the results are considered reactive.

• Nonreactive. If your baby's heartbeat doesn't meet the criteria described above, the results are considered nonreactive. Nonreactive results might occur because your baby was inactive or asleep during the test.

A reactive non-stress test is considered reassuring regardless of the length of observation time needed. However, if the test is extended to 40 minutes and your baby's non-stress test results are non reactive, your health care provider will likely do another prenatal test to further check your baby's health. For example:

• Biophysical profile. A biophysical profile combines a nonstress test with a fetal ultrasound that evaluates your baby's breathing, body movements, muscle tone and amniotic fluid level.

• Contraction stress test. This test looks at how your baby's heart rate reacts when your uterus contracts. During a contraction stress test, if adequate uterine activity doesn't occur on its own you will be given intravenous oxytocin or be asked to rub your nipples to induce uterine activity.

Your health care provider might also ask you to have another non-stress test that day.

Other possible causes of a nonreactive non-stress test result, besides the fetus being inactive or asleep, include decreased oxygen (fetal hypoxia), maternal smoking, maternal use of medications, and fetal neurological or cardiac anomalies.

Rarely, during a non-stress test, problems with a baby's heart rate are detected that require further monitoring or treatment.

Be sure to discuss the results of your non-stress test with your health care provider and what they might mean for you and your baby.

For more health tips: kindly follow my page to re-quip you with health related matters and don't hesitate to like, share and comments in the box below

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