The evaluation of the efficiency of the cryopreservation of human's gametes and embryos in assisted reproductive technology program

Cryopreservation of gametes and embryos is the essential of modern reproductive medicine. This study aimed to evaluate the efficiency of the native and frozen material in the assisted reproductive technology programs. We investigated 120 semen samples of healthy males (sperm donors). One hundred cases (83%) demonstrate mobility attenuation after defrosting from 67% to 84% versus initial value. During the investigation of 35 native and 23 frozen oocytes, we taped an insignificant decreasing of cleavage rate (from 98,4% to 84,2%, p=0,018). We performed 1289 defrosted gametes and embryos transfers and used closed (n=611, CryoTip, USA) and open (n=678, CryoTop, Japan) type carriers. The majority of indicators was better when we used open type carriers: survival (84,8% for closed type, 95,1% for open type, p