According to a recent study, blood pressure levels of 140/90 mmHg or above at 20 weeks of gestation can predict poor pregnancy outcomes. The researchers wanted to see if changing the definition of gestational hypertension to reflect 2017 recommendations that reduced blood pressure thresholds to 120/80 mmHg would enhance accuracy in detecting risks. The research looked at 12 trials that included almost 250,000 pregnant women. The majority of studies have a significant risk of bias. Only stage 2 hypertension, defined as blood pressure of 140 mmHg or higher for systolic or 90 mmHg or higher for diastolic, was consistently associated with poor outcomes such as preeclampsia across trials. While the 130/80 mmHg and 120/under 80 mmHg cutoffs were associated with certain concerns, no blood pressure threshold could effectively rule out dangers.

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