Skip to main content

Table 2 Cycle characteristics of the two study groups

From: Effect of retained embryos on pregnancy outcomes of in vitro fertilization: a matched retrospective cohort study

Characteristics

RE group (n = 95)

Matched group (n = 190)

P-value

Fresh ET cycle, n(%)

50(52.6%)

100(52.6%)

 

Frozen ET cycle, n(%)

45(47.4%)

90(47.4%)

 

Stimulation protocol, n(%)

 Long agonist

44(88.0%)

88(88.0%)

 

 Antagonist

6(12.0%)

12(12.0%)

 

Total dose of Gn (IU)

3049.4 ± 1408.2

2850.6 ± 897.5

0.280

Endometrium thickness (mm)

11.1 ± 3.2

10.8 ± 2.4

0.645

No. of oocytes retrieved

10.3 ± 6.1

11.3 ± 5.4

0.195

No. of good quality embryos

4.9 ± 3.2

4.8 ± 2.8

0.918

Protocol for frozen ET, n(%)

 Natural cycle

10(28.6%)

20(28.6%)

 

 Artificial cycle

35(77.8%)

70(77.8%)

 

Cleavage-stage ET, n(%)

69(72.6%)

138(72.6%)

 

Blastocyst transfer, n(%)

26(27.4%)

52(27.4%)

 
  1. Data are presented as mean ± SD for continuous variables and n(%) for categorical variables
  2. ET embryo transfer, Gn gonadotropin