Reducing consumption of processed meat by around one-third could prevent more than 350,000 cases of diabetes in the US over 10 years, a study suggests. Cutting US adults' processed meat intake by 30%—the equivalent of around ...
Jul 3, 2024
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Research from Saint Louis University School of Medicine finds improvements in survival in both veterans and men across the country over the last 20 years in metastatic prostate cancer, which correlate with new hormonal treatments.
Jun 20, 2024
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Researchers have discovered that the hepatitis E virus is associated with sperm in pigs, which suggests the virus may be both sexually transmitted and linked to male infertility, according to a new study published in PLOS ...
Jun 18, 2024
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Researchers have consistently shown that prenatal exposure to Di (2-ethyhexyl) phthalate harms the reproductive system in male mice and causes fertility defects. In a new study, scientists from the University of Illinois ...
Jun 15, 2024
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A dysfunctional enzyme may lead to nonalcoholic fatty liver disease in mice, according to a study published in Science Advances.
Jun 13, 2024
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Women live longer than men. This isn't unique to humans, either; we see this trend in a wide range of other animals. Biologists have theorized that the discrepancy in life expectancy between sexes might be partly related ...
Jun 12, 2024
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Adolescents worldwide have embraced social media and online platforms for self-expression and to explore their identity. This freedom, however, can lead to risky behaviors, especially with limited adult supervision. For example, ...
Jul 9, 2024
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A fungal toxin that hinders animal fertility and fetal development may also disrupt human sex hormones in pregnancy, according to a Rutgers Health study.
Jul 1, 2024
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A study performed in mice has uncovered a potential new tool to combat the escalating issue of childhood obesity. The research suggests that a simple dietary change, in the form of a fish oil supplement taken by fathers, ...
Jun 29, 2024
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Moderate levels of physical activity and fitness may be linked to a reduced risk of amyotrophic lateral sclerosis (ALS) later in life, according to a new study published in Neurology. However, the study only found an association ...
Jun 26, 2024
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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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