Table 4 Perinatal outcomes of control and four phenotypes of PCOS patients giving birth to singletons after the frozen-thawed embryo transfers

Gestational age, weeks

39.0 (38.1, 39.6)

39.0 (38.0, 39.6)

0.451¹

38.6 (37.4, 39.0)

0.005^1*

39.0 (38.3, 39.7)

0.145¹

38.7 (38.0, 39.5)

0.603¹

Birth weight, g

3350.0 (3100.0, 3650.0)

3350.0 (3100.0, 3650.0)

0.988¹

3300.0 (3000.0, 3663.0)

0.594¹

3440.0 (3100.0, 3750.0)

0.063¹

3600.0 (2950.0, 3950.0)

0.500¹

Delivery mode

0.397²

0.488²

0.763²

1³

 Natural labor

800 (13.3%)

54 (11.9%)

5 (10.0%)

29 (14.1%)

1 (11.1%)

 Cesarean delivery

5193 (86.7%)

398 (88.1%)

45 (90.0%)

177 (85.9%)

8 (88.9%)

Gender

0.376²

0.485²

0.346²

0.527³

 Male

3292 (54.9%)

258 (57.1%)

25 (50.0%)

120 (58.3%)

6 (66.7%)

 Female

2701 (45.1%)

194 (42.9%)

25 (50.0%)

86 (41.7%)

3 (33.3%)

Abnormal perinatal outcomes

 VPTB

45 (0.8%)

4 (0.9%)

0.775³

0 (0.0%)

1³

1 (0.5%)

1³

0 (0.0%)

1³

 PTB

497 (8.3%)

44 (9.7%)

0.288²

9 (18.0%)

0.034^3*

14 (6.8%)

0.442²

1 (11.1%)

0.542³

 VLBW

27 (0.5%)

2 (0.4%)

1³

0 (0.0%)

1³

1 (0.5%)

0.611³

0 (0.0%)

1³

 LBW

260 (4.3%)

20 (4.4%)

0.916²

1 (2.0%)

0.724³

6 (2.9%)

0.326²

1 (11.1%)

0.330³

 Macrosomia (≥ 4000 g)

375 (6.3%)

35 (7.7%)

0.203²

1 (2.0%)

0.371³

18 (8.7%)

0.145²

1 (11.1%)

0.442³

 VSGA

115 (1.9%)

9 (2.0%)

0.906²

1 (2.0%)

0.622³

4 (1.9%)

0.799³

0 (0.0%)

1³

 SGA

207 (3.5%)

19 (4.2%)

0.395²

1 (2.0%)

1³

8 (3.9%)

0.732²

0 (0.0%)

1³

 LGA

951 (15.9%)

75 (16.6%)

0.662²

8 (16.0%)

0.982²

40 (19.4%)

0.164²

4 (44.4%)

0.041^3*

 HDP

234 (3.9%)

25 (5.5%)

0.089²

8 (16.0%)

<.001^3*

14 (6.8%)

0.037^2*

2 (22.2%)

0.046^3*

 GDM

343 (5.7%)

33 (7.3%)

0.167²

7 (14.0%)

0.024^3*

8 (3.9%)

0.261²

1 (11.1%)

0.412³

 Fetal malformation

62 (1.0%)

10 (2.2%)

0.022^2*

1 (2.0%)

0.409³

1 (0.5%)

0.724³

1 (11.1%)

0.091³