Other

The clitoris—a brief history

"What's the difference between a bar and clitoris? Most men have no trouble finding a bar." In the world of humour, the clitoris remains a mystery: supposedly small, and so inevitably difficult to locate. "Which dinosaur ...

Medical research

Study identifies four major subtypes of long COVID

The post-COVID syndrome known as long COVID has four major subtypes defined by different clusters of symptoms, according to a study led by researchers at Weill Cornell Medicine.

Overweight & Obesity

Research helps explain why obesity is more dangerous for men

A newly published study from York University sheds light on the biological underpinnings in sex differences in obesity-related disease, with researchers observing "striking" differences in the cells that build blood vessels ...

Cardiology

Examining stroke treatment for people with disabilities

When conducting clinical research, investigators aim to control as many variables as possible so it is easier to examine the effectiveness of new treatments. However, this sometimes means strict requirements lead to only ...

Neuroscience

Good news for athletes who are slow to recover from concussion

A new study suggests that athletes who recover more slowly from concussion may be able to return to play with an additional month of recovery beyond the typical recovery time, according to a new study published in the January ...

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Female

Female (♀) is the sex of an organism, or a part of an organism, which produces mobile ova (egg cells). The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon, is produced by the male. A female individual cannot reproduce sexually without access to the gametes of a male (an exception is parthenogenesis). Some organisms can reproduce both sexually and asexually.

There is no single genetic mechanism behind sex differences in different species and the existence of two sexes seems to have evolved multiple times independently in different evolutionary lineages. Other than the defining difference in the type of gamete produced, differences between males and females in one lineage cannot always be predicted by differences in another. The concept is not limited to animals; egg cells are produced by chytrids, diatoms, water moulds and land plants, among others. In land plants, female and male designate not only the egg- and sperm-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