The competition is fierce and only the strongest survive the obstacle course within the female reproductive tract. Of the millions of sperm that enter the vagina,only about 10 or so make it to the oocyte or egg, demonstrating how rigorous the natural sperm choice process really is. So how is it possible to choose only the best sperm for assisted reproductive technologies such as in vitro fertilization? That's what a researcher at Florida Atlantic University is aiming to finish with his microfluidic technology for reproductive medicine.
Source: phys.org