Who 4th edition for sperm morphology
Exception: sperm morphology, revised several times No difference in semen volume and morphology between the 2 groups. MacLeod . 1st-4th Editions.
23 Jan Comparison of WHO 4th and 5th Edition Morphology Criteria The New 5th WHO Manual Semen Parameter Reference Values - Menkveld.
Sexual and reproductive health
Description:Giemsa staining, routinely used in our laboratory, yielded a higher mean percentage of head abnormalities in the normozoospermia, asthenozoospermia and oligoasthenozoospermia groups when morphology was assessed by WHO criteria compared to strict criteria. However, other researches 7,8 found good correlation between staining methods used in their study. All spermatozoa not considered abnormal, were regarded as normal, and morphologically normal spermatozoa were, therefore, identified by default. To the best of our knowledge, this is the first report on comparison of methods and intra-laboratory variations in Croatia. As you might imagine, actually measuring each possibly normal sperm head in the sample is extremely tedious.