Electronic Fetal Heart MonitoringExternal Fetal Heart Monitoring, Fetal Heart Monitoring, Internal Fetal Heart Monitoring How To PrepareYou may be asked to eat a meal shortly
before having a nonstress test, because digesting food often increases the
movement of your baby. If you are having a contraction stress
test, you may be asked to not eat or drink for 4 to 8 hours before the
test. If you smoke, you will be asked to stop smoking for two
hours before the external monitoring test because smoking decreases your baby's
activity.
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