Table 1

A. Donors
Table 1. Numbers of retrieved and vitrified oocytes stratified by age
Group		Age	Nº		Doses of gonadotropins			Nº oocyte retrieval		Nº of oocyte MII	Nº of oocyte GVBD	Nº of oocyte GV	Nº of atretic oocyte
DONOR		<21	96		2087±369			17.53±8.95		14.18±7.68	0.84±1.11	1.97±2.74	0.50±0.79
		21-25	121		2062±369			19.60±13.10		15.80±10.77	0.83±1.22	2.24±3.29	0.50±0.85
		26-30	71		2056±434			19.75±12.70		15.13±9.74	0.83±1.11	2.85±3.37	1.00±2.74
B. Patients
Group	Age			Nº		Doses of gonadotropins	Nº oocyte retrieval		Nº of oocyte MII		Nº of oocyte GVBD	Nº of oocyte GV	Nº of atretic oocyte
PATIENT	<21			2		2025±250	12.00±7.07		8.00±.24		1.50±0.71	2.00±1.41	0.50±0.71
	21-25			15		2133±342	17.80±11.92		13.60±8.96		0.93±1.10	2.80±4.74	0.47±0.74
	26-30			19		2300±156	12.79±7.26^a		10.89±6.91		0.84±1.07	0.79±.92^a	0.26±0.45
	31-35			60		2371±558	9.60±7.54^a		7.43±6.05^a		0.50±0.89	1.33±2.12^a	0.23±0.62
	36-40			192		2285±841	5.63±5.92^a,b,c		4.54±4.91^a,b,c		0.36±0.70	0.53±1.04^a,c	0.17±0.44
	41-45			100		2066±807	3.46±3.72^a,b,c		2.79±3.15^a,b,c		0.18±0.48^a,b	0.23±0.57^a,c	0.20±0.68
	>45			10		1800±252	1.30±1.25^a,b,c		1.20±1.32^a,b,c		0.00^a	0.00^a	0.10±0.32
Oocytes vitrified at the MII stage. MII= metaphase II; GVBD= germinal vesicle breakdown; GV= germinal vesicle. The statistical analysis was performed and should be interpreted as follows: (a) statistically different means of the following agegroups 21 - 25 (p<0.05); (b) with 26 - 30 (p<0.05) and (c) with 31 - 35 (p<0.05).