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Table 1 Demographic and clinical characteristics of singleton and twin births by oocyte source and embryo type

From: Number of embryos transferred and diagnosis of preeclampsia

Characteristic N (%)

Singleton Birth

Twin Birth

Autologous

Donor

Autologous

Donor

Fresh (N = 10,137)

Cryopreserved (N = 1557)

Fresh (N = 861)

Cryopreserved (N = 363)

Fresh (N = 6742)

Cryopreserved (N = 809)

Fresh (N = 855)

Cryopreserved (N = 142)

Age, years (mean ± S.D.)

35.3 (4.1)

35.1 (3.9)

41.9 (4.4)

42.4 (4.4)

34.6 (3.8)

34.4 (3.8)

41.3 (4.8)

43.1 (4.1)

Infant sex: Male

5257 (51.9)

802 (51.5)

438 (50.9)

180 (49.6)

3435 (51.0)

429 (53.0)

433 (50.6)

75 (52.8)

Gravida = 1

4638 (45.8)

488 (31.4)

377 (44.1)

81 (22.5)

3263 (48.4)

305 (38.0)

373 (43.8)

38 (26.8)

Parity = 0

6834 (67.8)

784 (50.8)

627 (73.7)

187 (53.1)

4657 (69.5)

477 (59.9)

603 (71.4)

74 (52.1)

Body Mass Index (kg/m2)

  < 18.5

129 (2.4)

25 (3.1)

8 (1.9)

< 5

98 (2.7)

6 (1.4)

10 (2.7)

< 5

 18.5–24.9

3245 (59.1)

454 (56.2)

273 (63.3)

92 (55.8)

2092 (58.9)

256 (58.5)

246 (66.5)

38 (63.3)

 25–25.9

1260 (22.9)

203 (25.1)

96 (22.3)

44 (44 (26.7)

798 (22.5)

106 (24.2)

88 (23.8)

12 (20.0)

  > 30

859 (15.6)

126 (15.6)

54 (12.5)

27 (16.4)

567 (16.0)

70 (16.0)

26 (7.0)

8 (13.3)

 Missing (N)

4644

749

430

198

3187

371

495

82

Race/Ethnicity

 White, non-Hispanic

8428 (83.3)

1280 (82.2)

732 (85.3)

318 (87.6)

5641 (83.9)

671 (83.6)

765 (89.9)

114 (80.3)

 Black, non-Hispanic

327 (3.2)

65 (4.2)

26 (3.0)

10 (2.8)

182 (2.7)

36 (4.5)

20 (2.4)

6 (4.2)

 Hispanic

406 (4.0)

66 (4.2)

36 (4.2)

14 (3.9)

292 (4.3)

46 (5.7)

26 (3.1)

< 5

 American Indian

90 (0.9)

12 (0.8)

< 5

< 5

68 (1.0)

7 (0.9)

6 (0.7)

< 5

 Asian/Pacific Islander

869 (8.6)

134 (8.6)

57 (6.6)

20 (5.5)

542 (8.1)

43 (5.4)

34 (4.0)

20 (14.1)

Chronic hypertension

113 (1.1)

25 (1.6)

23 (2.7)

7 (1.9)

102 (1.5)

6 (0.7)

30 (3.5)

6 (4.2)

Gestational Hypertension

476 (4.7)

93 (6.0)

63 (7.3)

39 (10.7)

465 (6.9)

86 (10.6)

88 (10.3)

8 (5.6)

Diabetes

92 (0.9)

16 (1.0)

5 (0.6)

< 5

48 (0.7)

< 5

< 5

< 5

Gestational Diabetes

746 (7.4)

123 (7.9)

80 (9.3)

31 (8.5)

665 (9.9)

60 (7.4)

98 (11.5)

26 (18.3)

Infertility Diagnosis

 Tubal

819 (8.1)

135 (8.7)

8 (0.9)

6 (1.7)

472 (7.0)

85 (10.5)

6 (0.7)

< 5

 Ovulatory dysfunction

849 (6.6)

155 (10.0)

17 (2.0)

20 (5.5)

619 (9.2)

95 (11.7)

34 (4.0)

10 (7.0)

 Diminished ovarian reserve

455 (4.5)

25 (1.6)

404 (46.9)

140 (38.6)

220 (3.3)

6 (0.7)

372 (43.5)

52 (36.6)

 Endometriosis

415 (4.1)

61 (3.9)

11 (1.3)

< 5

273 (4.1)

34 (4.2)

14 (1.6)

6 (4.2)

 Uterine

116 (1.1)

19 (1.2)

< 5

< 5

70 (1.0)

6 (0.7)

< 5

< 5

 Male only

2441 (24.1)

382 (24.5)

18 (2.1)

< 5

1610 (23.9)

198 (24.5)

36 (4.2)

< 5

 Other

879 (8.7)

116 (7.5)

137 (15.9)

81 (22.3)

572 (8.5)

74 (9.2)

163 (19.1)

34 (23.9)

 Unknown

2532 (25.0)

388 (24.9)

54 (6.3)

25 (6.9)

1847 (27.4)

205 (25.3)

66 (7.7)

10 (7.0)

 Multiple female w/o male

512 (5.1)

98 (6.3)

88 (10.2)

40 (11.0)

317 (4.7)

24 (3.0)

76 (8.9)

14 (10.0)

 Multiple female + male

1119 (11.0)

178 (11.4)

122 (14.2)

40 (11.0)

742 (11.0)

82 (10.1)

86 (10.1)

8 (5.6)

  1. Cells with N < 5 were suppressed to protect confidentiality