_:vb50949484 . _:vb50949484 . _:vb50949484 . _:vb50949484 . _:vb50949484 "url:http://ghr.nlm.nih.gov/glossary=azoospermia"^^ . _:vb50949484 "A male infertility disease characterized by the absence of any measurable level of sperm in semen."^^ . _:vb50949484 . _:vb50949484 . _:vb50949484 "url:http://en.wikipedia.org/wiki/Azoospermia"^^ .