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One of the tests performed on pregnant women when they reach the third trimester of gestation is the O'Sullivan Test. This test allows to know the levels of glucose in the blood and thus detect possible gestational diabetes.
Normally, the O'Sullivan test is performed between the 24th and 28th week of pregnancy, although if necessary, it can be performed before this date.
Read the full article on: Prenatal pregnancy control: tests, laboratory tests and ultrasound scans ( 42).
By Marta Barranquero Gómez B.Sc., M.Sc. (embryologist), Óscar Oviedo Moreno M.D. (gynecologist), Zaira Salvador B.Sc., M.Sc. (embryologist) and Cristina Algarra Goosman B.Sc., M.Sc. (psychologist).
Last Update: 06/09/2025
