4.

全胚冷冻周期首次FET妊娠结局

Clinical outcomes of the first frozen-thawed embryo transfer cycle with a "freeze-all" strategy

Index	No addition	Early addition	Middle and late addition	P
No. of cycles	139	73	70	-
No. of embryos transferred	1.72±0.53	1.74±0.50	1.81±0.43	0.354
Implantation rate	17.15% (41/239)	19.69% (25/127)	20.47% (26/127)	0.823
Clinical pregnancy rate	24.5% (34/139)	28.8% (21/73)	31.4% (22/70)	0.537
Early miscarriage rate	20.6% (7/34)	33.3% (7/21)	9.1% (2/22)	0.147
Heterotopic pregnancy rate	0.0% (0/34)	4.8% (1/21)	0.0% (0/22)	0.259
Live birth rate	15.1% (21/139)	16.4% (12/73)	27.1% (19/70)	0.204