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Table 1 Comparison of the MSD, CRL and FHR in the two groups during each gestational week

From: A logistic model to predict early pregnancy loss following in vitro fertilization based on 2601 infertility patients

Parameters

Ongoing pregnancy

Early pregnancy loss

P

95 % CI

 

n = 2400

n = 201

  

MSD (mm)

6 week

19.95 ± 3.64

17.50 ± 4.82

<0.01

(1.42, 3.47)

7 week

26.42 ± 5.48

19.06 ± 6.68

<0.01

(5.76, 8.97)

8 week

35.70 ± 5.89

24.39 ± 8.2

<0.01

(7.61, 15.02)

9 week

41.16 ± 6.16

30.00 ± 8.94

0.006

(4.26, 18.07)

10 week

48.59 ± 6.27

-

-

-

CRL (mm)

6 week

3.93 ± 1.134

3.30 ± 1.05

<0.01

(0.383, 0.863)

7 week

9.56 ± 2.34

5.22 ± 2.77

<0.01

(3.672, 5.011)

8 week

18.57 ± 2.58

8.17 ± 5.3

<0.01

(8.030, 12.774)

9 week

24.50 ± 2.57

13.93 ± 11.6

0.026

(1.645, 19.489)

10 week

34.98 ± 3.35

-

-

-

FHR (bpm)

6 week

115.64 ± 9.25

98.12 ± 17.66

<0.01

(15.421, 19.606)

7 week

144.31 ± 12.36

97.26 ± 32.68

<0.01

(39.665, 54.427)

8 week

172.85 ± 9.12

100.86 ± 40.74

<0.01

(53.887, 90.078)

9 week

175.89 ± 9.27

118.44 ± 50.91

0.010

(18.305, 96.594)

10 week

172.31 ± 9.21

-

-

-

  1. Comparisons were made using a two sample t-test
  2. Values are expressed as the means ± standard deviation
  3. CI confidence interval