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| Sample type | AC | EB | PAC | N | MP | A | T |
|---|---|---|---|---|---|---|---|
| Fresh sperm | + | − | − | − | + | − | − |
| Epididymal sperm | + | − | − | − | + | − | − |
(+), positive; (−), negative; A, annulus; AC, acrosomal cap; EB, equatorial band; MP, midpiece; N, neck; PAC, post-acrosomal cap; T, tail.
