Tabela I. Clinical and Laboratory data of the studied groups during fresh cycles.
	Group I (L-ZT)	Group II (Not L-ZT)	P
Patient	90	45
Age	32.3 ±4.7	32.9±4.5	0.36
Number of collected oocytes	15.6 ±6.3	13.9±6.3	0.10
Number of oocytes MII	12.6 ±4.9	11.9±5	0.41
Fertilization rate	70.4%±16	74.7% ± 14	0.19
Number of embryos transferred	2.6 ±0.7	2.6±0.8	0.69