We read with great interest the article recently published by Menkeveld et al.1 as we have a double interest in sperm morphology assess-ment.The first one as a Clinical Andrology Laboratory(Laboratory of Male Fertility,Department of Clinical Biochemistry,Faculty of Pharmacy and Biochemistry,
University of Buenos Aires, Argentina)attempting to give aluable diagnosis to our patients, and the second one as Sponsors of the External Quality Control for the Study of Human Semen in Argentina(Programa de Evaluación Externa de la Calidad(PEEC)de la Fundación Bioquimica Argentina2).