Table 4 Neonatal outcomes according to the two GnRH-a protocols before and after propensity score matching

Gestational weeks

38.08 (1.89)

37.93 (2.05)

0.121

38.17 (1.76)

38.03(1.98)

0.270

Birth weights(g)

3133.28 (572.87)

3042.07 (594.01)

0.002

3165.93 (564.08)

3059.98 (587.38)

0.004

Fetuses delivered, n (%)

0.002

0.056

 Single

449/581 (77.28)

1069/1517 (70.47)

367/467 (78.59)

374/511 (73.19)

 Twins

132/581 (22.72)

448/1517 (29.53)

100/467 (21.41)

137/511 (26.81)

Fetus's sex, n (%)

0.026

0.371

 A boy

251/581 (43.20)

583/1517 (38.43)

198/467 (41.40)

201/511 (39.33)

 A girl

198/581 (34.08)

486/1517 (32.04)

169/467 (36.19)

173/511 (33.86)

 Two boys

40/581 (6.88)

143/1517 (9.43)

31/467 (6.64)

40/511 (7.83)

 Two girls

24/581 (4.13)

97/1517(6.39)

22/467 (4.71)

35/511 (6.85)

 A boy and a girl

68/581 (11.70)

208/1517 (13.71)

47/467 (10.06)

62/511 (12.13)

Fetal malformation rate (%)

5/581 (0.86)

16/1517 (1.05)

0.694

4/467 (0.86)

9/511 (1.76)

0.147