Sperm motility and viability of experimental animals using different cryopreservatives

Abstract

Fertility rates have continued to show a dramatic decline worldwide, including South Korea. According to data from Statistics Korea, the average fertility rate dropped to 1.1 births between 2015 and 2020, the lowest reported birth rate among OECD countries. Greece, Japan, and Canada have reported some of the lowest fertility rates; the increasing number of couples with infertility and subfertility problems is one of the reasons for low fertility. Masoumi et al. (2015) reported that the causes of infertility were female etiological factors in 30-55%, male etiological factors in 20-40%, and unknown etiology in 5-15%. The causes of male infertility were semen disorders in 44.6%, genetic factors in 29.8%, vascular disorders in 17.2%, and spermatogenesis agents in 11%. Consequently, cryopreservation of healthy sperm cells with suitable motility or embryos created by in-vitro fertilization has been