Reproduction News and Research

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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

Cooperative sperm may improve fertilization success across diverse arthropods

Fertilization is often imagined as a frantic race, with millions of sperm competing for a single prize. But new research by a team of evolutionary biologists from Syracuse University, University of Siena, Italy, and University of Szeged, Hungary, reveals a more surprising reality, where success can depend less on competition and more on cooperation.

31 Jul 2026

How intensive poultry farming accelerated the evolution of Campylobacter

Intensive poultry farming transforms Campylobacter jejuni ecology, enhancing host adaptability and raising concerns for foodborne illness transmission.

31 Jul 2026

Differing priorities create barriers to AI adoption in older adult healthcare

While artificial intelligence (AI) holds immense promise for transforming health care for older adults, a new study published in JMIR Aging reveals significant friction between those who use AI health tools and those who create and fund them.

30 Jul 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

Two interconnected signaling pathways drive papillary thyroid carcinoma progression

A new research perspective was published in Volume 13 of Oncoscience on June 3, 2026, titled "The dual axis of tumorigenesis: MAPK and PI3K/AKT pathways in papillary thyroid carcinoma."

24 Jul 2026

Peroxisome preservation extends lifespan and protects mitochondrial health in worms

A new research paper was published in Volume 18 of Aging on July 6, 2026, titled "Inhibition of peroxisomal protein PRX-11 promotes longevity in Caenorhabditis elegans via enhancements to mitochondria."

21 Jul 2026

Vitamin D falls short as an add-on treatment for endometriosis

An eight-week randomized trial of 66 women found that adjunctive vitamin D did not significantly or meaningfully improve endometriosis pain or quality of life compared with placebo during dienogest therapy. The results do not support routine short-term adjunctive supplementation, although the brief trial and absence of post-treatment vitamin D measurements leave longer-term effects uncertain.

19 Jul 2026

AI-based nursing interventions can improve care of people living with chronic illnesses

Artificial intelligence (AI) is helping nurses better predict health problems before they become emergencies, according to a new review of existing research published in JMIR Nursing.

16 Jul 2026

Study suggests lipid droplet accumulation is a conserved feature of senescent cells

A new research paper was published in Volume 18 of Aging on July 1, 2026, titled "Senescent cells accumulate lipid droplets."

16 Jul 2026

Endometriosis affects multiple body systems beyond pelvic pain

Migraines, digestive problems, anxiety, and depression can be part of endometriosis, although they are often interpreted as separate conditions.

16 Jul 2026

Fruit fly study uncovers gene behind seasonal winter dormancy

Researchers at Washington State University have discovered a molecular "winter lock" that keeps animals in a less active winter state until favorable conditions return, a discovery that could improve pest control and lead to a better understanding of seasonal health conditions in humans.

15 Jul 2026

Cell death crosstalk network drives acute respiratory distress syndrome

Acute respiratory distress syndrome (ARDS) remains one of the deadliest complications of severe infections, sepsis, trauma, and viral pneumonia, yet decades of research have produced few targeted therapies capable of improving patient outcomes.

14 Jul 2026

Machine learning redefines precision cancer therapy using smart radiopharmaceuticals

JMIR Publications released a feature News and Perspectives story on technological advances in oncology.

11 Jul 2026

Modern IVF treatment boosts live births while lowering twin pregnancies

Modern IVF treatment can now achieve substantially higher success rates than historical approaches while dramatically reducing twin and triplet pregnancies, according to new research presented today at the 42nd Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE).

7 Jul 2026

Hospital admissions for miscarriage and ectopic pregnancy rise in England

Hospital admissions for miscarriage and ectopic pregnancy have increased in England in recent years, according to research presented today at the 42nd Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE).

7 Jul 2026

Adaptor proteins regulate macrophage behavior to control cancer growth

A new review was published in Volume 13 of Oncoscience on May 22, 2026, titled "Adaptor proteins regulating tumor-associated macrophage polarization during cancer progression."

7 Jul 2026

Structured setup drives patient engagement with virtual reality therapy

A new study published in JMIR XR and Spatial Computing demonstrates that the way virtual reality therapeutics (VRx) are introduced to patients is a critical factor in how successfully they adopt the technology.

7 Jul 2026

Could IVF affect heart health after pregnancy?

Women with IVF-conceived pregnancies exhibit higher large artery stiffness, indicating potential cardiovascular risks that warrant further investigation.

7 Jul 2026

Frozen embryo transfers dominate assisted reproduction across Europe

More than 1.15 million assisted reproductive technology (ART) treatment cycles were reported across Europe in 2023, according to preliminary data presented by the European IVF Monitoring (EIM) Consortium at the 42nd Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE).

6 Jul 2026