Reply to: sperm chromatin structural assay versus hypo-osmotic swelling test in predicting the need for in vitro fertilization with intracytoplasmic sperm injection

Sir, From Dr Check's Letter to the Editor (2004) the main questionis whether sperm chromatin structural assay (SCSA) can be usedas a prognostic tool in assisted reproduction technologies (ART)or not. From my point of view the research on this topic isstill in its early phase, in which typical problems such assmall study groups and