A team of researchers from Denmark and France has found that taking regular doses of the pain reliever ibuprofen over a long period of time can lead to a disorder in men called compensated hypogonadism. In their paper published ...
Dear Healthy Men: You recently wrote about a CDC report that supposedly showed that males are more likely than females to commit suicide. Well, my 19-year-old niece recently killed herself and I just saw the new CDC report ...
Oct 25, 2019
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Two recent studies highlight novel ways to combat pattern hair loss in men and women using small molecules such as JAK inhibitors that reawaken dormant hair follicles, as well as stem cell therapies aimed at growing new follicles.
Jun 25, 2019
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It's no secret that puffing cigarettes is the culprit behind a whole host of ailments, including respiratory diseases and cancers of the lungs and throat. But a new University of Nevada, Las Vegas (UNLV) study has revealed ...
Jun 8, 2022
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In Australia, an average baby boy born in 2016 could expect to live to 80, while a baby girl born at the same time could expect to live until closer to 85. A similar gap in life expectancy between men and women is seen around ...
Jun 10, 2019
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The brain regulates social behavior differently in males and females, according to a new study published today in the Proceedings of the National Academy of Sciences.
Oct 31, 2016
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Social avoidance is a common symptom of PTSD, and scientists working to better understand why have laboratory evidence that while stress hormone levels consistently increase in the immediate aftermath of a traumatic event, ...
Sep 20, 2022
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A team of researchers affiliated with several institutions in the U.S. and one in Canada has found evidence that suggests recombinant human growth hormone (rhGH) can reverse epigenetic aging in humans. In their paper published ...
Obesity and reduced insulin sensitivity are common in polycystic ovary syndrome, PCOS. New research based on animal studies, and to be published in the journal PNAS, reveals that the hormone adiponectin can protect against ...
Aug 10, 2017
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A new study investigating if mental health helps shape satisfaction with partners has revealed there are differences between females and males—with men having the potential to experience a vicious circle.
Jun 8, 2022
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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.
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