[Prognostic value on recovery rates for the application of sperm preparation techniques and their evaluation in sperm function].

Objective: To evaluate sperm recovery and total sperm motility in three different sperm preparation techniques (density gradient, simple washing and swim-up).

Patients And Methods: A total of 290 subjects were randomly evaluated from November 2001 to March 2003. The density gradient method required Isolate (upper and lower layers).

[Activation in the metaloproteinases complex in the follicle-embryonic generative capability].

Objective: To evaluate the impact of the enzymatic inhibition complex of metaloproteinases [TIMP(MMP-3 stromelisine-1)] in follicle/genesis processes and their ovule/embryonic subsequent development in stimulated cycles.

Type Of Study: Prospective longitudinal in research center.

Materials And Methods: A total of 20 patients were evaluated in vitro fertilization cycles measuring matrix metaloproteinases concentrations in days 3 and 12 of ovarian stimulation, as well as in the follicular liquid at the moment of ovarian retrieval.