B) Researchers on subfertility-Can U hear an old man? When one should insist for electron microscopically evaluation of Sperms? The clinical indications to refer a mean to higher center of excellence?? What abnormal report will dictate us?? C)

A)                                                                                                               Whenever sperm motility is > 5-10% persistently without evidence of compromise in vitality or seminal infection then he should be referred for higher center for such special investigation. The most common defect observed in such cases will  be defects in sperm tails (with defects either in axoneme  or outer dense fibres) :(Source:  Name of Book :“Infertility in Male” Eds Larry I Lipshultz et al ; Pub: Cambridge University Press-Ed 4^th Ed. Printed at Haryana, India, p. 179, ).