Table 2 Percentiles of maternal plasma C-type natriuretic peptide (pg/mL) at 22–40 weeks of gestational age (GA)

22

35

1.19

1.02

11.81

143.92

422.60

528.13

629.23

23

16

1.45

0.81

11.04

141.19

417.86

522.82

623.42

24

0

1.73

0.62

10.30

138.48

413.15

517.53

617.63

25

2

2.04

0.45

9.58

135.80

408.47

512.28

611.88

26

19

2.38

0.31

8.90

133.14

403.81

507.05

606.15

27

19

2.74

0.20

8.23

130.51

399.18

501.84

600.44

28

9

3.13

0.11

7.59

127.91

394.58

496.67

594.77

29

7

3.54

0.05

6.98

125.34

390.00

491.52

589.12

30

14

3.98

0.01

6.40

122.79

385.45

486.39

583.49

31

23

4.44

0.00

5.84

120.26

380.93

481.30

577.90

32

7

4.93

0.01

5.30

117.77

376.43

476.23

572.33

33

5

5.44

0.05

4.79

115.29

371.96

471.19

566.79

34

16

5.98

0.12

4.31

112.85

367.52

466.17

561.27

35

18

6.54

0.21

3.85

110.43

363.10

461.18

555.79

36

5

7.13

0.33

3.42

108.04

358.71

456.22

550.32

37

8

7.75

0.47

3.01

105.67

354.35

451.28

544.89

38

19

8.39

0.64

2.63

103.33

350.01

446.38

539.48

39

23

9.06

0.83

2.28

101.02

345.70

441.49

534.10