Table 2 Summary of IVF treatment cycle characteristics of all patients undergoing IVF: last cycle before and first cycle after bariatric surgery

BMI

Mean ±SD

43.1±3.3

29.6±7.3

0.018

Median

42.7

29.8

Range

39.1-47.8

20.7-38.9

Total number of gonadotropin ampoules used

Mean ±SD

69.3±10.5

44.5±17.0

0.043

Median

71.7

36.5

Range

50-78

30-66

Days of stimulation

Mean ±SD

15.2±5.6

10.7±1.6

0.068

Median

12.5

11

Range

11-25

8-13

Peak E ₂ (pmol/L)

Mean ±SD

3049.5±1462.6

3782.4±1642.5

0.46

Median

3596

4398.8

Range

1158-4302

1065.0-5444.0

Number of follicles ≥15 mm on day of hCG administration

Mean ±SD

3.8±2.3

7.0±4.2

0.1

Median

3

8

Range

2-8

1-11

Number of oocytes retrieved

Mean ±SD

10.1±6.3

8.7±6.5

0.6

Median

9.5

9

Range

2-19

1-20

Number of MII oocytes

Mean ±SD

7.7±5.0

7.7±5.0

1.0

Median

7.5

8

Range

2-14

1-16

% MII of all oocytes retrieved

Mean ±SD

79%±21.3

90.9±11.5

0.1

Median

74

100

Range

50-100

76-100

Fertilization rate (%)

71.7%±21.5

67.9±26.5%

Median

78.6

50

Range

50-100

44-100

0.46

Number of top-quality embryos

Mean ±SD

1.6±2.5

1.6±1.3

0.78

Median

1

1

Range

0-6

0-3

% of top-quality embryos

Mean ±SD

28.2%±29.6

37.2±23.59

0.78

Median

25.0

42.8

Range

0-66

0-75

Number of embryos transferred

Mean ±SD

2.5±0.8

2.8±1.1

0.51

Median

2

3

Range

2-4

1-4

Number of embryos frozen

Mean ±SD

1.8±2.0

0.8±1.6

0.28

Median

1.5

1.5

Range

0-4

0-4