Shape of a sperm

The point is that there are no absolutes in the area of sperm evaluation. View the discussion thread. In the past, this was one of the most widely used accessory tests in the evaluation of advanced sperm function. Pyriform pear-shaped head and bent, abnormal midpiece bull; eosin-nigrosin stain. By testing for sperm DNA fragmentation, many cases of formally "unexplained" infertility can now be explained. What the approval of the new flu drug Xofluza means for you. Can you get pregnant right after stopping the pill?