Table 3 Univariate comparisons for the yolk sac during the 5–10 complete gestational weeks, divided into below-, and above, the median yolk sac measurement in pregnancies that continued beyond the forst trimester.

5^th

35–41

below median

15

2.1 (1.8, 2.2)

4

1.4 (1.1, 1.9)

above median

13

2.5 (2.4, 2.7)

5

2.6 (2.4, 3.0)

6^th

42–48

below median

67

2.2 (2.1, 2.4)

8

1.9 (1.3, 2.3)

above median

82

2.8 (2.7, 3.1)

11

3.6 (3.2, 4.6)

7^th

49–55

below median

84

2.6 (2.3, 2.8)

7

2.6 (1.6, 2.8)

above median

78

3.3 (3.1, 3.5)

23

4.3 (3.5, 5.7)

8^th

56–62

below median

74

3.0 (2.8, 3.1)

7

2.3 (2.1, 3.0)

above median

76

3.7 (3.4, 3.9)

17

4.5 (4.0, 5.5)

9^th

63–69

below median

70

3.4 (3.1, 3.5)

6

2.7 (1.8, 3.3)

above median

71

4.0 (3.8, 4.4)

5

5.5 (4.5, 7.6)

10^th

70–76

below median

58

3.7 (3.2, 3.9)

4

2.2 (2.0, 2.7)

above median

59

4.5 (4.2, 4.9)

1

4.2 (4.2, 4.2)