News tagged with males

Related topics: females · sperm

Premature ejaculation isn't a true illness

A new review argues that premature ejaculation—which has become the center of a multimillion dollar business—should not be classified as a male sexual dysfunction. By pointing to false assumptions about premature ejaculation, ...

Nov 04, 2015
popularity17 comments 0

Fracking chemicals tied to reduced sperm count in mice

Prenatal exposure to a mixture of chemicals used in the oil and natural gas drilling technique known as hydraulic fracturing, or fracking, at levels found in the environment lowered sperm counts in male mice when they reached ...

Oct 14, 2015
popularity99 comments 0

The dilemma of screening for prostate cancer

Primary care providers are put in a difficult position when screening their male patients for prostate cancer—some guidelines suggest that testing the general population lacks evidence whereas others state that it is appropriate ...

Oct 14, 2015
popularity6 comments 0


Male (♂) refers to the sex of an organism, or part of an organism, which produces small mobile gametes, called spermatozoa. Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilization. A male cannot reproduce sexually without access to at least one ovum from a female, but some organisms can reproduce both sexually and asexually.

Not all species share a common sex-determination system. In humans and most animals, sex is determined genetically but in other species it can be determined due to social, environmental, or other factors. The existence of two sexes seems to have been selected independently across different evolutionary lineages (see Convergent Evolution). Accordingly, sex is defined operationally across species by the type of gametes produced (ie: spermatozoa vs. ova) and differences between males and females in one lineage are not always predictive of differences in another.

Male/Female dimorphism between organisms or reproductive organs of different sexes is not limited to animals; male gametes are produced by chytrids, diatoms and land plants, among others. In land plants, female and male designate not only the female and male gamete-producing organisms and structures but also the structures of the sporophytes that give rise to male and female plants.

This text uses material from Wikipedia, licensed under CC BY-SA

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