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Means ± SDs of heart rate and blood pressures measured at the three trimesters of normal pregnancy.
| Trimesters | HR (beats/min) | SBP (mmHg) | DBP (mmHg) |
|---|---|---|---|
| First | 85 ± 12 | 115 ± 10 | 73 ± 9 |
| Second | 93 ± 11∗∗ | 111 ± 8∗∗ | 70 ± 7∗∗ |
| Third | 94 ± 13∗∗ | 109 ± 11∗∗ | 69 ± 9∗∗ |
∗∗ p < 0.01 in comparison with the first trimester.
