Key result
Pregnancy blood pressure dips in early mid-trimester but rises significantly by delivery.
Why the study?
It is uncertain whether preeclampsia is caused by pre-existing factors or by pregnancy itself.
Cohort (n=1,915)
No
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A large pre-conception cohort in China demonstrates that blood pressure decreases in the early second trimester before increasing in the third trimester and at delivery.
Wen et al. (2012) conducted a cohort in Preeclampsia (n=1,915). Pregnancy vs. Pre-conception level was evaluated on Blood pressure changes. Systolic and diastolic blood pressure decreased in the early second trimester from pre-conception levels but increased in the third trimester and at delivery among 1,915 couples.
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