MEAN GESTATIONAL SAC DIAMETER (MM)

MENSTRUAL AGE (WKS)

PREDICTED HCG (IU/L), RANGE = 95% PREDICTION INTERVAL

3

4.6

1,710 (1,050-2,800)

4

4.7

2,320 (1,440-3,760)

5

4.9

3,100 (1,940-4,980)

6

5.1

4,090 (2,580-6,530)

7

5.3

5,340 (3,400-8,450)

8

5.4

6,880 (4,420-10,810)

9

5.6

8,770 (5,680-13,660)

10

5.7

11,040 (7,220-17,050)

11

5.9

13,730 (9,050-21,0408)

12

6.0

16,870 (11,230-25,640)

13

6.1

20,480 (13,750-30,880)

14

6.3

24,560 (16,650-36,750)

15

6.4

29,110 (19,910-43,220)

16

6.6

34,100 (23,530-50,210)

17

6.7

39,460 (27,470-57,640)

18

6.9

45,120 (31,700-65,380)

19

7.0

50,970 (36,130-73,280)

20

7.1

56,900 (40,700-81,150)

21

7.3

62,760 (45,300-88,790)

22

7.4

68,390 (49,810-95,990)

23

7.6

73,640 (54,120-102,540)

24

7.7

78,350 (58,100-108,230)

25

7.9

82,370 (61,640-112,870)

26

8.0

85,560 (64,600-116,310)

27

8.3

87,820 (66,900-118,420)

28

8.4

89,050 (68,460-119,130)

29

8.6

89,230 (69,220-118,420)

30

8.7

88,340 (69,150-116,310)