Millions or billions of sperm are deposited by artificial insemination or natural mating into the cow reproductive tract but only a few arrive at the site of fertilization and only one fertilizes an oocyte. The remarkable journey that successful sperm take to reach an oocyte is long and tortuous. and includes movement through viscous fluid. avoiding dead ends and hostile immune cells. https://fitnessgravesyardes.shop/product-category/spin-bike-pedals/