Improved outcome of twice weekly nonstress testing

Area of Science:

• Obstetrics and Gynecology
• Fetal Monitoring
• Perinatal Health

Background:

• The nonstress test (NST) is a standard method for assessing fetal well-being.
• Previous studies indicated a higher antenatal death rate with NST compared to contraction stress tests.
• Weekly NSTs in high-risk pregnancies were associated with a stillbirth rate of 6.1 per 1000.

Purpose of the Study:

• To evaluate the impact of increasing nonstress test frequency on stillbirth rates.
• To determine if twice-weekly NSTs improve fetal outcomes in at-risk pregnancies.
• To provide evidence for optimizing antenatal surveillance protocols.

Main Methods:

• A cohort of 913 patients underwent twice-weekly nonstress tests starting January 1981.
• Fetal well-being was assessed using the nonstress test protocol.
• Stillbirth rates were compared between weekly and twice-weekly testing intervals.

Main Results:

• The stillbirth rate in the group with twice-weekly reactive nonstress tests decreased to 1.9 per 1000.
• A significant reduction in stillbirths was observed with increased testing frequency.
• This suggests improved detection of fetal compromise through more frequent monitoring.

Conclusions:

• Performing nonstress tests twice a week is recommended for high-risk pregnancies.
• Increased frequency of nonstress testing can lead to improved perinatal outcomes.
• Optimizing fetal surveillance protocols is crucial for reducing stillbirths.