What tests should be performed after completing the oral glucose tolerance test (OGTT)?
Jul 21, 2021
Source: Cainiu Health
Dr. Lei Ling
Introduction
After completing the oral glucose tolerance test, numerous other prenatal examinations remain. If no complications or other abnormalities are present, routine prenatal visits should be scheduled every four weeks. In the third trimester, pregnant women require monthly assessments of fetal heart rate and uterine height, as well as monitoring of fetal movements. A detailed color Doppler ultrasound examination is recommended between 30 and 32 weeks’ gestation. Starting at 37 weeks, weekly hospital visits are necessary to monitor fetal heart rate, assess fetal movements, and evaluate fetal engagement (descent into the pelvis).
Oral glucose tolerance testing (OGTT) during pregnancy involves administering a 75-gram oral glucose load to assess whether the pregnant woman has gestational diabetes mellitus (GDM). The optimal timing for this test is between 24 and 28 weeks of gestation, as results obtained during this period are most accurate.
Following the OGTT, additional prenatal examinations are required. In the absence of complications or other abnormalities, routine antenatal visits are scheduled every four weeks. However, if any abnormalities are detected, the frequency of antenatal visits must be increased accordingly.
In late pregnancy, monthly assessments—including fetal heart rate monitoring, uterine height measurement, and abdominal circumference measurement—are essential. Pregnant women should also monitor and record fetal movements daily. A detailed color Doppler ultrasound examination is recommended around 30–32 weeks’ gestation. During the final month—starting at 36 weeks—antenatal visits should occur weekly to evaluate fetal heart rate, monitor fetal movements, and assess fetal engagement (i.e., whether the fetus has entered the pelvis).
During the final week of pregnancy, comprehensive laboratory tests—including serum biochemistry, liver function tests, electrocardiogram (ECG), hepatitis B virus (HBV) screening, syphilis serology, and HIV testing—are required. Additionally, an ultrasound examination is performed to determine fetal presentation and placental maturity.
