Assessment of Chromatin Maturity in Human Spermatozoa: Useful Aniline Blue Assay for Routine Diagnosis of Male Infertility

Figure 1

Sperm chromatin condensation assessed by aniline blue. (a) Sample showing mainly mature sperm with unstained nucleus (*).   (b) Sample showing mainly immature sperm (◆) with blue-stained nucleus.

(a)

(b)