Table 4.

The pregnancy outcomes of artificial FET cycles in the subgroups of different embryos

	Low P+ strengthened LPS (Group A, n = 1295)	Normal P+ routine LPS (Group B, n = 1261)	Crude RR (95%CI)	Adjusted RR (95%CI)	P value
Cleavage embryo transfer
Clinical pregnancy rate	47.5% (513/1079)	51.7% (527/1020)	0.85 (0.71,1.0)	0.79 (0.65,0.96)	0.017
Miscarriage rate	16.1% (82/508)	14.1% (73/517)	1.17 (0.83,1.65)	1.19 (0.81,1.76)	0.37
Live birth rate	38.6% (416/1079)	42.1% (429/1020)	0.86 (0.73,1.03)	0.82 (0.67,0.99)	0.044
Blastocyst transfer
Clinical pregnancy rate	52.8% (114/216)	59.8% (144/241)	0.78 (0.52,1.16)	0.82 (0.54,1.24)	0.34
Miscarriage rate	15.2% (17/112)	17.0% (24/141)	0.87 (0.44,1.72)	0.82 (0.39,1.70)	0.82
Live birth rate	44.0% (95/216)	48.5% (102/241)	0.83 (0.58,1.20)	0.90 (0.60,1.36)	0.62
Single embryo transfer
Clinical pregnancy rate	36.3% (111/306)	49.6% (126/254)	0.58 (0.41,0.81)	0.57 (0.38,0.84)	0.005
Miscarriage rate	20.9% (23/110)	17.6% (22/125)	1.24 (0.65,2.37)	1.25 (0.59,2.66)	0.56
Live birth rate	28.4% (87/306)	40.6% (103/254)	0.58 (0.41,0.83)	0.56 (0.38,0.82)	0.005
Two-embryos transfer
Clinical pregnancy rate	52.2% (516/989)	54.2% (545/1006)	0.92 (0.77,1.10)	0.89 (0.73,1.08)	0.25
Miscarriage rate	14.9% (76/510)	14.1% (75/533)	1.07 (0.76,1.51)	1.08 (0.73,1.58)	0.71
Live birth rate	42.9% (424/989)	44.0% (443/1006)	0.95 (0.80,1.14)	0.93 (0.76,1.13)	0.45

Adjusted for BMI, baseline FSH values, antral follicle counts