Which test is run again in the third trimester for high-risk individuals?

In high-risk individuals during pregnancy, screening for sexually transmitted infections, specifically gonorrhea and chlamydia, is often recommended again in the third trimester. This is crucial as these infections can have significant implications for both maternal and fetal health. Although initial screenings are performed early in pregnancy, additional testing in the third trimester helps to identify any new infections that may have developed, which can potentially affect the pregnancy if left undiagnosed.

Gonorrhea and chlamydia can lead to complications such as preterm labor, miscarriage, and adverse neonatal outcomes if transmitted during delivery. Therefore, repeated screening in the third trimester is part of a proactive approach to ensure both the mother and baby remain healthy and to provide timely treatment if necessary.

Other tests listed, such as gestational diabetes screening, typically occur only once during the pregnancy, generally in the second trimester unless there are specific indications otherwise. Blood pressure checks are routinely monitored throughout the pregnancy but are not specifically a repeat test for the third trimester in the same sense. Fetal heart rate monitoring is also a routine part of prenatal care but does not fit the context of a re-evaluative screening test for high-risk individuals as described in the question.