Estimating the causal effect of embryo transfer day on clinical in vitro fertilization outcomes using propensity score matching

Table 2 Regression model estimating associated outcomes after matching

Variables	Implantation rate		Clinical Pregnancy rate		Odds of live birth
	Estimate (95% CI)	p-val	Estimate (95% CI)	p-val	OR (95% CI)	p-val
Embryo transfer day	0.13 (0.004, 0.26)	0.04	0.11 (-0.02, 0.24)	0.11	0.87 (0.68, 1.11)	0.27
Propensity score	0.28 (-0.01, 0.56)	0.06	0.31 (0.01, 0.61)	0.04	1.08 (0.63, 1.85)	0.78
No. embryos frozen	0.02 (-0.001, 0.048)	0.06	0.02 (-0.002, 0.05)	0.07	1.05 (1.00, 1.10)	0.08

Implantation rate: number of gestational sacs/ number of embryos transferred.
Clinical Pregnancy rate: number of fetal heartbeats present/ number of embryos transferred.

ISSN: 1471-2393