Table 1 Patient demographics and characteristics

Patient’s age, mean (SD)

33 (3.4)

33.6 (3.2)

< 0.0001

33.7 (3.3)

< 0.0001

Race/ethnicity, n (%)

0.08

0.03

 Non-Hispanic White

52 (4.6%)

138 (7.2%)

234 (6.3%)

 Non-Hispanic Black

74 (6.5%)

126 (6.5%)

196 (5.3%)

 Other (Asian/American Indian)

456 (40.1%)

742 (38.5%)

1586 (42.5%)

 Hispanic/Latino

118 (10.4%)

200 (10.4%)

333 (8.9%)

 Unknown

438 (38.5%)

719 (37.4%)

1383 (37.1%)

Recipient’s BMI, mean (SD)

26 (5.9)

26.1 (6.1)

0.75

26.4 (6.1)

0.09

Parity, n (%)

0.09

0.69

 Multiparous

197 (17.4%)

383 (20.0%)

668 (18.0%)

 Nulliparous

935 (82.6%)

1532 (80.0%)

3046 (82.0%)

Gravidity, median [Q1, Q3]

0 [0, 1]

0 [0, 1]

0.31

0 [0, 1]

0.80

Smoker

45 (4.0%)

81 (4.2%)

0.80

155 (4.2%)

0.83

Infertility diagnoses, n (%)

 Male infertility

405 (35.6%)

673 (35.0%)

0.75

1,371 (36.7%)

0.50

 Endometriosis

140 (12.3%)

198 (10.3%)

0.10

400 (10.7%)

0.15

 Polycystic ovarian syndrome

135 (11.9%)

208 (10.8%)

0.40

426 (11.4%)

0.72

 Diminished ovarian reserve

279 (24.5%)

602 (31.3%)

< 0.0001

1057 (28.3%)

0.01

 Tubal ligation/hydrosalpinx/other

176 (15.5%)

297 (15.4%)

1.00

584 (15.6%)

0.92

 Uterine factor infertility

62 (5.4%)

86 (4.5%)

0.26

150 (4.0%)

0.05

 Unexplained infertility

174 (15.3%)

286 (14.9%)

0.79

618 (16.6%)

0.33

 Other infertility diagnosis

122 (10.7%)

174 (9.0%)

0.14

248 (6.6%)

< 0.0001

FSH dose IU, mean (SD)

3601.9 (1776.8)

3622.6 (1876.3)

0.77

3592.6 (1728.9)

0.88

No. of available oocytes, median [Q1, Q3]

6 [4, 9]

4 [2, 7]

< 0.0001

6 [4, 8]

0.84

No. of excess embryos cryopreserved, median [Q1, Q3]

0 [0, 1]

0 [0, 0]

< 0.0001

0 [0, 0]

< 0.0001

Number of fertilized oocytes, median [Q1, Q3]

2 [1, 3]

1 [1, 2]

< 0.0001

3 [2, 3]

< 0.0001