BIRMINGHAM, ENGLAND – JANUARY 22: Sperm samples are monitored under a microscope at Birmingham Women’s Hospital fertility clinic on January 22, 2015 in Birmingham, England. Birmingham Womens Hospital provides a range of health services to women and their families using the latest scientific procedures and care. Last year the maternity unit delivered over 8,000 babies, cared for 50,000 patients and performed over 3000 procedures in its state of the art theatres. The hospital is also home to world renowned research scientists, fertility clinic and the national sperm bank. (Photo by Christopher Furlong/Getty Images)