D6 blastocyst transfer on day 6 in frozen-thawed cycles should be avoided: a retrospective cohort study

Table 4 Multivariable logistic regression analysis of the factors affecting EMR

	OR	95% CI	P-value
Maternal age	1.032	0.965–1.105	0.357
Paternal age	1.035	0.978–1.095	0.233
BMI	1.025	0.957–1.098	0.478
Type of infertility	0.999	0.674–1.480	0.995
Previous failures^a			0.996
Endometrial thickness	0.988	0.851–1.146	0.869
Endometrial preparation	1.953	1.254–3.043	0.003
Physician performing the transfers^a			0.991
Number of blastocyst transferred	1.633	0.981–2.719	0.059
Quality of blastocysts transferred	1.368	0.841–2.226	0.207
Category of blastocyst transfer			0.042
D6-on-D6 versus D5	1.636	0.971–2.757	0.065
D6-on-D5 versus D5	2.165	1.040–4.506	0.039

The total sample size of the logistic model was 1050 clinical pregnant FET cycles
^aThe number of dummy variables is excessively long to list

ISSN: 1471-2393