From: Trends of blood pressure and heart rate in normal pregnancies: a systematic review and meta-analysis
Inclusion criteria | Exclusion criteria |
---|---|
Cross-sectional, case-control or longitudinal study | Measurements from women with illnesses likely to affect the cardiac or respiratory systems‡ |
Minimum of 50 patients | Measurements from women who were recruited because they were considered to be at high-risk of developing a pregnancy complication |
Age 14 years or older | Measurements from women known to be taking medication which could affect the measurements |
Objective measurement* of heart rate and/or blood pressure | Measurements from women where the reported gestational age at the point of measurement was not defined in terms of days or weeks of gestation |
Measurements taken during the antenatal period, up to the start of the intrapartum period†| Measurements from women where the time window in which the measurement was taken was not defined to within 16 weeks |
Raw data or average measure reported and possible to extract within minimum accuracy | Measurements from self-monitoring or other measurements not taken by a healthcare professional |
 | Measurements from women with less than 10% singleton pregnancies |
 | For women known to undergo fertility procedures, any measurements taken prior to a positive pregnancy test |
 | Any of the following measurements (without valid baseline): • Measurements taken using ambulatory technologies • Measurements taken using invasive technologies • Measurements taken during anaesthesia • Measurements taken during sleep • Measurements taken during exercise • Measurements taken at heights greater than 1000 m above sea level |