Is an increase in penile length cause for concern?

According to trends in male reproductive health data, sperm quality and testosterone levels have declined over the last few decades, sounding alarm bells for Michael Eisenberg, MD, a professor of urology at Stanford Medicine. ...


Another promising step toward non-hormonal male contraceptives

Despite birth control existing for decades, almost none of the options specifically target sperm cells. Researchers are now developing approaches that target testosterone or otherwise interrupt the sperm's ability to fertilize ...


Mutations in CCIN cause teratozoospermia and male infertility

In mammalian spermatogenesis, drastic shape changes occur during the maturation of spermatids into spermatozoa. The morphology of mature sperm is one of the important indicators to evaluate male fertility, and clinical evidence ...

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