Semen News and Research

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Semen is an organic fluid, also known as seminal fluid, that usually contains spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize female ova. The process of discharge is called ejaculation.

HIV awareness emphasizes prevention, treatment and healthy aging

About 1.2 million people in the United States are living with HIV, or human immunodeficiency virus. Because of major advances in medical treatment and technology, people with HIV are living long, healthy lives.

18 Sep 2026

Male contraception has barely changed in a century. What comes next?

A review traces more than 5,000 years of male contraception, from early penile sheaths and the development of modern condoms and vasectomy to today's search for reversible alternatives. Researchers are now testing hormonal gels, non-hormonal compounds and vas-occlusive technologies, although these approaches remain at different stages of preclinical and clinical development.

15 Sep 2026

Seminal fluid facilitates monkeypox virus entry into human cells

Monkeypox virus used to be transmitted predominantly from animals to humans. In recent years, however, new virus variants have become increasingly capable of spreading from person to person.

31 Aug 2026

Paternal sperm epigenetics may help explain early pregnancy loss

When a pregnancy ends early and unexplained, the search for answers usually begins with the mother. Lacey Luense, Ph.D., wants to know what the father's sperm might have to do with it.

28 Aug 2026

Pomegranate phytobiotics offer natural alternative to synthetic veterinary drugs

Researchers have identified a broad range of biological properties in pomegranate with potential for use in medical applications, including antimicrobial, antiparasitic, antioxidant, immunomodulatory, antidiabetic, anti-inflammatory, liver-supporting, and wound-healing effects.

27 Aug 2026

Study links higher body fat to lower sperm counts despite normal BMI

Among 1,058 Danish men, higher body fat percentage was associated with lower total sperm count and altered reproductive hormone levels, but not testicular volume. Body fat percentage showed stronger links with several semen measures than BMI or waist-to-height ratio, with the sperm-count association strengthening among men with normal BMI.

2 Aug 2026

Body fat percentage predicts male fertility better than BMI

A man's body fat percentage may be a better indicator of his reproductive health than body mass index (BMI) according to a large study of over 1000 Danish men.

29 Jul 2026

Study links geography to significant differences in sperm quality

A new nationwide study has found substantial regional differences in sperm quality, with men in the highest-performing region recording almost double the total motile sperm count of those in the lowest-performing region.

6 Jul 2026

Air pollution may impact genes involved in sperm development

New research presented today at the 42nd Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE) suggests that exposure to air pollution may impact genes associated with sperm development, raising new questions about male fertility, pregnancy outcomes and offspring health.

6 Jul 2026

New protocol identifies sperm biomarkers to diagnose male infertility

Researchers from the EHU-University of the Basque Country have developed a robust protocol to detect the molecules involved in the metabolic reactions of sperm.

26 Jun 2026

Cerebral organoid model offers insights into the mechanisms of Ebola virus persistence

Following infection, Ebola virus can survive unnoticed in the human body for months or even years, hiding in areas with little immune surveillance like the central nervous system.

17 Jun 2026

Men's fertility-friendly underwear may be briefs without benefits

A narrative review found that tight-fitting underwear may modestly raise scrotal temperature and is inconsistently linked to lower sperm production measures. However, current evidence does not show that switching to looser underwear improves real-world fertility outcomes.

17 Jun 2026

Early chemical exposure linked to sperm abnormalities in men

An estimated 7% of all men are affected by infertility. Multiple animal studies indicated that exposure to persistent environmental chemicals in early life can negatively impact male reproductive health, and now a human study suggests the same.

4 May 2026

Microplastics found in human bile may be associated with gallstones

Findings show microplastics in bile may trigger cellular senescence, suggesting a link to gallstone disease and highlighting the need for further research.

9 Apr 2026

Study reveals bile as reservoir for microplastics in humans

Plastic pollution has become one of the defining environmental issues of modern life, and microplastics are now known to enter the body through food, drink, and air.

6 Apr 2026

Men show major gaps in male fertility knowledge, study finds

A study of 156 adult men found that knowledge about male fertility was generally low across both medical and lifestyle-related topics, with only 5 of 25 questions answered correctly by most respondents. Older men, those with a medical background, and those with suspected or treated infertility tended to score higher, while supplement use was common despite limited fertility literacy.

26 Mar 2026

Groundbreaking methods identify aggressive prostate cancer

The research lays a foundation for the possibility that aggressive prostate cancer can probably be detected through a few drops of semen or blood in the long term.

12 Feb 2026

IVF study finds shorter insemination protects embryo availability without harming success

Short-term sperm–oocyte co-incubation during IVF cycles with only one or two retrieved oocytes produced cumulative live birth rates comparable to conventional overnight insemination. It also improved fertilisation metrics and reduced cancellation or no-embryo cycles, suggesting practical laboratory advantages without improving overall live birth probability.

4 Feb 2026

Genomic mapping of resistance mutations in A. baumannii

The bacteria Acinetobacter baumannii (A. baumannii) is a haunting presence in many hospitals in the United States, where more than one in 100 patients are treated for A. baumannii infections.

7 Nov 2025

Columbia researchers report first successful pregnancy using AI-guided sperm recovery method

Researchers at the Columbia University Fertility Center reported the first successful pregnancy using an AI-guided method they developed to recover sperm in men with azoospermia, in which ejaculate contains little or no sperm.

31 Oct 2025