Intramuscular injection of human chorionic gonadotropin prior to secretory transformation in patients undergoing frozen-thawed embryo transfer cycles

Table 2 Outcomes of frozen embryo transfer (FET) cycles

	Control group (n = 364)	hCG group (n = 337)	Odds ratio (95% CI)	P-value
Implantation rate^*	246/690 (35.7%)	294/632 (46.5%)	1.570(1.259–1.958)	< 0.001^a
Clinical pregnancy rate^*	184/364 (50.5%)	207/337 (61.4%)	1.558 (1.153–2.104)	0.004
Ectopic pregnancy rate	1/364 (0.3%)	3/337 (0.9%)	3.260 (0.338–31.498)	0.280
Ongoing pregnancy rate^#	157/364 (43.1%)	178/337 (52.8%)	1.476 (1.096–1.988)	0.010
First trimester miscarriage rate	27/184 (14.7%)	29/207 (14.0%)	0.947 (0.538–1.669)	0.852
Live birth delivery rate^*	144/364 (39.6%)	168/337 (49.9%)	1.519 (1.126–2.049)	0.006

Implantation rate = the number of intrauterine gestational sacs / the number of embryos transferred * 100%;
First trimester miscarriage rate = the cycles of lost pregnancies before 12 gestational weeks / the cycles of clinical pregnancies. * 100%;
^*P < 0.01
^#P < 0.05
^aP = 0.00006

ISSN: 1477-7827