OGTT levels in pregnancy: what the results mean

OGTT levels in pregnancy are interpreted by comparing timed blood glucose readings with the thresholds used by your maternity team. The test may include a fasting sample, a measured glucose drink, and later samples. A result outside the agreed range can lead to further assessment for gestational diabetes; one reading should be discussed in the context of the complete test.

The fasting value reflects glucose before the drink. Later values show how your body handles the glucose load over time. The laboratory report may label results as fasting, one-hour, or two-hour readings, depending on the protocol used. Thresholds vary between guidelines and services, so do not compare your number with an online chart from another country. Your clinician can explain whether the test was complete and what each result means for pregnancy care.

Keep the report and note which sample each value belongs to. Ask whether you need repeat testing, glucose checks at home, dietary support, or an appointment with the maternity team. Do not change prescribed medicines or restrict food sharply based on a single reading. The [Glucose Tolerance Test](/treatments/pregnancy-and-birth-care/glucose-tolerance-test/) page explains the test process, while an [Antenatal Care Package](/treatments/pregnancy-and-birth-care/antenatal-care-package/) can help organise ongoing pregnancy monitoring.

Contact your maternity team promptly if the service asks you to discuss an abnormal OGTT result or you cannot complete the test. Seek urgent maternity advice for severe vomiting with inability to keep fluids down, fainting, confusion, marked weakness, or symptoms that feel suddenly severe. A high OGTT result is a reason for planned follow-up; urgency depends on your symptoms and clinical assessment.

Which reading was outside the target range? Which guideline and timing were used? Do I need monitoring or another appointment? What should I eat and drink while waiting? Who should I contact if I feel unwell?