In a pregnant woman, a glucose screening test should be done at:
A. 24 weeks
B. 20 weeks
C. 16 weeks
D. 10 weeks
ANS: A
Laboratory studies during the initial visit are quite extensive. These screening tests are dependent on the disease prevalence within the screened population (Table 19.2). Laboratory testing throughout the pregnancy is dependent on presenting complaints and the developmental stage of the pregnancy. For example, a glucose screen should be done between 24 and 26 weeks of gestation, whereas an anemia screen (hemoglobin and hematocrit) should be done initially and again at 28 to 36 weeks. However, if the woman complains of a vaginal discharge later in the pregnancy, a gonorrhea and chlamydia culture could be done even if the initial screen was negative.
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