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The term sperm refers to the male reproductive cells. In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell. The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell.

U of U Health researchers assess the effectiveness of new contraceptive gel for men

University of Utah Health scientists are testing a new contraceptive gel for men. Based on preliminary research, the scientists believe the hormonal gel decreases a man’s sperm production––reducing his chances of fathering a child––without decreasing his sex drive.

20 Jan 2022

COVID-19 vaccination does not appear to impair fertility, study says

COVID-19 vaccination does not affect the chances of conceiving a child, according to a study of more than 2,000 couples that was funded by the National Institutes of Health.

20 Jan 2022

A newly discovered species of worm kills tarantulas

Scientists have named a newly discovered species of worm that kills tarantulas after American actor, musician and producer Jeff Daniels, a distinction no other entertainer can claim.

20 Jan 2022

Sperm sharing should be subject to the same regulatory oversight as egg sharing, argues expert

The practice of sperm sharing-whereby a man must make a minimum of 10 sperm donations in exchange for a reduction in the cost of his partner's fertility treatment-should be subject to the same regulatory oversight as egg sharing, argues a mental health doctor in the Journal of Medical Ethics.

19 Jan 2022

Impact of COVID-19 on male and female reproductive health

A new review article investigated the relation between SARS-CoV-2 infection and reproductive health.

19 Jan 2022

Study reveals an increasing proportion of women giving birth at 40+

An increasing proportion of women aged 40 and over in Sweden and Denmark are giving birth. Nevertheless, over a recent 10-year period, the need for assisted reproduction for women over 40 in Scandinavia has doubled, a study led by University of Gothenburg researchers shows.

11 Jan 2022

New genetic mechanism that can cause severe male infertility identified

Scientists at Newcastle University have identified a new genetic mechanism that can cause severe forms of male infertility.

10 Jan 2022

Researchers plan to review the effect of SARS-CoV-2 on male reproductive health

In a protocol published in BMJ Open, researchers from the Chengdu University of Traditional Chinese Medicine plan to review current studies in this area.

10 Jan 2022

COVID can affect sperm quality for three months

Researchers determine whether SARS-CoV-2 could cross the blood-testis barrier and be detected in human semen after infection.

22 Dec 2021

How SARS-CoV-2 affects the male reproductive system

Researchers review the potentially harmful consequences on the male reproductive system in COVID-19 patients.

15 Dec 2021

Researchers use gene-editing to create single sex mice litters

Scientists at the Francis Crick Institute, in collaboration with University of Kent, have used gene editing technology to create female-only and male-only mice litters with 100% efficiency.

6 Dec 2021

Cannabis vapor exposure generationally affects sperm counts and motility in mice

An intense but short-term exposure to cannabis vapor lowered sperm counts and slowed sperm movement, or motility, not only in the directly exposed male mice but also in their sons.

2 Dec 2021

Impact of SARS-CoV-2 infection on testis function

A study published in the journal Nature Reviews Urology discusses the impact of coronavirus disease 2019 (COVID-19) on male fertility.

2 Dec 2021

Researchers shed light on an important stage of early human embryogenesis for the first time

Scientists have shed light on an important stage of early embryonic development that has never been fully mapped out in humans before.

29 Nov 2021

Impact of SARS-CoV-2 infection on human semen quality

A new review article aimed to extract, review and summarize these articles from the mentioned databases to determine the link between SARS-CoV-2 infection and semen quality.

3 Nov 2021

Scientists flip a new piece in the male infertility puzzle

Scientists at Cincinnati Children's appear to have flipped another piece in the underexplored puzzle of male infertility.

27 Oct 2021

Air pollution reduces sperm count by causing brain inflammation, mice study shows

Researchers have long known that air pollution can increase the risk of disorders such as obesity, diabetes, and fertility, but they did not know the exact mechanism for how it can lead to these health conditions.

25 Oct 2021

UGA study makes breakthrough for treatment of male infertility

With global rates of male infertility continuing to rise, a new study in spermatogonial stem cell research led by researchers at the University of Georgia provides hope for future clinical therapies.

19 Oct 2021

Study detects the presence of SARS-CoV-2 in semen along with low sperm count

A new study reported findings of semen analysis from a prospective COVID-19 cohort study.

15 Oct 2021

Researcher calls for a broader and more inclusive definition of infertility

Academy Research Fellow Jukka Kekäläinen from the University of Eastern Finland calls for a broader and more inclusive definition of infertility in a recent opinion piece published in the journal Human Reproduction last week.

7 Oct 2021