Table 2. Linear regression predictors for the perinatal outcomes gestational weeks to live birth (GW), baby birth weight (BW) and baby birth length (BL)
	GW			BW			BL
	β	CI 95%	p	β	CI 95%	p	β	CI 95%	p
Total FSH dose	0.001	0.000;0.001	0.143	0.145	-0.009;0.280	0.156	0.001	0.000;0.002	0.220
Estradiol level at hCG day	0.000	-0.001;0.000	0.261	-0.065	-0.1440.015	0.108	0.000	-0.001; 0.000	0.139
Follicles	-0.005	-0.043; 0.034	0.818	-3.910	-11.207;3.386	0.293	-0.069	-0.127;-0.012	0.018
Retrieved oocytes	0.010	-0.024;0.044	0.570	1.060	-5.882;8.002	0.764	-0.087	-0.175;0.000	0.049
MII oocytes	-0.004	-0.061;0.053	0.889	-5.649	-16.750;5.451	0.318	-0.029	-0.080;0.022	0.269
Fertilization rate	-0.014	-0.036;0.008	0.209	1.957	-0.334;2.017	0.968	-0.009	-0.042;0.025	0.608
Obtained Embryos	-0.013	-0.089;0.063	0.735	-3.813	-17.800; 10.175	0.592	-0.091	-0.205;0.023	0.117
High-quality embryo rate at day two	0.237	-1.283;1.758	0.759	28.347	-265.482;322.176	0.850	-0.220	-2.610;2.170	0.856
High-quality embryo rate at day three	-0.152	-1.407;1.102	0.811	-1.791	-254.143;250.561	0.989	-0.220	-2.610;2.170	0.856
Blastocyst rate	0.722	-0.596;2.040	0.281	88.885	-185.104;354.87	0.536	-0.973	-3.010;1.064	0.347
Endometrial thickness	0.198	0.069;0.327	0.003	28.351	0.770;55.932	0.044	0.164	-0.044;0.372	0.121
Implantation rate	0.005	-0.033; 0.042	0.813	0.720	-6.787;8.227	0.850	-0.035	-0.094;0.023	0.238
FSH= Follicle-stimulating hormone, β= Regression coefficient, CI: 95% confidence interval for β. Data was adjusted for maternal age and BMI, number of transferred embryos, number of gestational sacs and number of born infants.