A City University of Hong Kong (CityUHK) research team led by Professor Michael Yang Mengsu, Senior Vice-President (Innovation and Enterprise), and Yeung Kin Man Chair Professor of Biomedical Sciences, collaborated with mainland ...
11 hours ago
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An unexpectedly versatile and regenerative stem cell in early embryos may be key to creating new effective fertility treatments, suggests a new study in mice from the University of Copenhagen.
Jun 24, 2024
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Seminoma, a type of testicular cancer that predominantly affects young men, is the most common testicular germ cell tumor and is characterized by its similarity to primordial germ cells (PGCs), the precursor to sperm cells ...
Jun 19, 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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New research from Oregon Health & Science University describes the science behind a promising technique to treat infertility by turning a skin cell into an egg that is capable of producing viable embryos.
Mar 8, 2024
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A novel screening system developed at Kyoto University enables researchers to investigate sperm cell development and health at the molecular level.
Mar 5, 2024
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Early in the development of sperm, a strange event happens: the X and Y chromosomes condense into tight packages and are sequestered away from the other 44 human chromosomes. If any part of this process goes awry, the cells ...
Feb 22, 2024
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Physician-researcher Joyce Asseler and gynecologist Norah van Mello examined the ovarian tissue of transgender people who had their ovaries removed as part of their gender-affirming treatment. They had all used testosterone ...
Feb 22, 2024
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The testis is responsible for sperm production and testosterone synthesis. Abnormalities in testis development and function lead to disorders of sex development (DSD) and male infertility. Currently, no in vitro system exists ...
Feb 20, 2024
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Surveys show most men in the United States are interested in using male contraceptives, yet their options remain limited to unreliable condoms or invasive vasectomies. Recent attempts to develop drugs that block sperm production, ...
Feb 20, 2024
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A sperm, from the ancient Greek word σπέρμα (seed) and ζῷον (living being) and more commonly known as a sperm cell, is the haploid cell that is the male gamete. It joins an ovum to form a zygote. A zygote is a single cell, with a complete set of chromosomes, that normally develops into an embryo.
Sperm cells contribute half of the genetic information to the diploid offspring. In mammals, the sex of the offspring is determined by the sperm cell: a spermatozoon bearing a Y chromosome will lead to a male (XY) offspring, while one bearing an X chromosome will lead to a female (XX) offspring (the ovum always provides an X chromosome). Sperm cells were first observed by Anton van Leeuwenhoek in 1677.
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