Table 1 Patient characteristics by ART outcome

Age(years)

30.9 ± 4.68

29.97 ± 3.87

32.71 ± 5.52

Duration of infertility (years)

3.53 ± 2.72

3.34 ± 2.40

3.90 ± 3.23

Type of infertility, n (%)

Primary

14,220(64.2%)

9776(66.5%)

4444(59.7%)

Secondary

7915(35.8%)

4918(33.5%)

2997(40.3%)

Cause of infertility, n (%)

Tubal

11,064(50.1%)

7585(51.6%)

3479(46.8%)

Ovulatory

2266(10.2%)

1807(12.3%)

459(6.2%)

Male

3733(16.8%)

2514(17.1%)

1219(16.4%)

DOR

1161(5.2%)

558(3.8%)

603(8.1%)

Endometriosis

1973(8.9%)

1350(9.2%)

623(8.4%)

Uterine disease

568(2.6%)

347(2.4%)

221(3.0%)

Unexplained

1370(6.1%)

533(3.6%)

837(11.1%)

BMI (kg/m²)

21.88 ± 2.95

21.80 ± 2.93

22.09 ± 3.02

Number of mature oocytes, n (%)

1–3

2326(10.5%)

508(3.5%)

1818(24.4%)

4–8

6737(30.4%)

3673(25.0%)

3064(41.2%)

9–14

7910(35.7%)

6002(40.8%)

1908(25.6%)

≥15

5162(23.4%)

4511(30.7%)

651(8.7%)

FSH (mIU/mL)

7.71 ± 2.78

7.37 ± 2.25

8.36 ± 3.51

P(ng/ml)

0.94 ± 0.71

0.95 ± 0.61

0.92 ± 0.90

Insemination method, n (%)

IVF

15,105(68.2%)

10,177(69.3%)

4928(66.2%)

ICSI

7030(31.8%)

4517(30.7%)

2513(33.8%)

Down-regulation method, n (%)

Long GnRH agonist

8797(39.9%)

6620(45.0%)

2207(29.7%)

GnRH-antagonist

5351(24.3%)

2743(18.7%)

2638(35.4%)

Daily GnRH-agonist

7897(35.8%)

5331(36.3%)

2596(34.9%)

No. of transferred blastocyst, n

1.01 ± 0.83

1.10 ± 0.80

0.84 ± 0.85