Fertility News and Research

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Lifestyle factors aggravate genetic causes of male infertility, study finds

Lifestyle factors can worsen the effects of genetic causes of male infertility, finds new research that could help explain why men carrying similar genetic mutations often experience different levels of fertility impairment.

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

Study reveals public willingness to select embryos using traits when given choices

A study of more than 2,000 people in the United States and China finds that the line between medical and non-medical traits, which underpins the rules on embryo testing in most countries, does not match the preferences of the public.

26 Aug 2026

Review uncovers how tryptophan metabolism affects female reproductive health

In recent years, issues concerning female reproductive health have become a global challenge that cannot be ignored.

24 Aug 2026

PCOS prevalence rises among pregnant women in China

Polycystic ovary syndrome (PCOS) affects approximately 6% to 20% of women of reproductive age globally and remains undiagnosed and poorly managed, especially during pregnancy, leading to significant healthcare costs.

21 Aug 2026

Childhood overweight linked to lower childbirth rates later in reproductive life

Women with childhood overweight or obesity trajectories had lower hazards of childbirth from their mid-20s onward, with the strongest associations emerging after age 30. Childhood BMI trajectories were generally not associated with diagnosed infertility, suggesting that biological infertility alone may not explain the reduced childbirth rates.

11 Aug 2026

Higher doses of common fertility drug linked to pregnancy risks

Around one in six people experience infertility, with irregular or absent ovulation among the most common causes.

10 Aug 2026

Risk-adapted frameworks reshape pediatric neuroblastoma care

Neuroblastoma is the most common solid tumor outside the brain in children younger than five years old and accounts for about 15% of pediatric cancer deaths.

6 Aug 2026

Experts call for better trials as IVF preparation techniques show unproven results

Preparation techniques used before embryo transfer, considered the most critical step in the IVF process, show no proven effect on pregnancy rates and remain inconclusive due to limited or low-quality data, a new Cochrane review finds.

6 Aug 2026

Older men’s sexual priorities extend well beyond erectile function

A web-based survey of 6,000 Japanese men aged 50 or older found that sexual arousal was the function they most wanted to preserve, while erection became more highly valued as erectile function worsened. Erection showed the earliest age-related decline pattern, whereas ejaculation was the function most often reported as lost in older age.

6 Aug 2026

High childhood body mass index linked to adult childlessness

A study of almost 61,000 women in Denmark, published in the journal JAMA Network Open, finds that women who had an overweight or obesity body mass index (BMI) trajectory during childhood were less likely to have children than women with a normal (average) BMI trajectory, and this effect on childlessness was already apparent in their mid-20s.

4 Aug 2026

First consensus guidelines outline GLP-1 medication use during pregnancy

As the use of GLP-1 and other incretin-based medications for obesity continues to grow worldwide, researchers at Marshall University have contributed to an international effort to address one of medicine's most pressing unanswered questions: How should these medications be used by women before, during and after pregnancy?

3 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

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

Exposure to fungicides and insecticides alters onset of puberty in girls

The study, which tracked more than 500 Spanish girls between the ages of 7 and 10, links the presence of certain fungicides in urine to early menarche and that of the insecticide chlorpyrifos to delayed menarche, highlighting the impact of pesticides on pubertal development.

31 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

Parenthood impacts women's health more than men's health

According to OPIK, the research group of the EHU-University of the Basque Country, the arrival of children is associated with changes in women's health that are not observed in men's health.

28 Jul 2026

Lifestyle habits may explain difference in endometriosis symptoms

Investigating lifestyle factors, this study highlights their role in quality of life for women with endometriosis, advocating for personalized care strategies.

28 Jul 2026

Global childhood IBD trends reveal unequal progress in diagnosis and survival

An analysis of GBD 2021 estimates across 204 countries and territories found that global deaths from early-onset IBD fell by approximately 71% among children younger than 10 between 1990 and 2021. However, estimated incident and prevalent case numbers rose while the age-standardized incidence rate remained broadly stable, with persistent socioeconomic and regional inequalities.

20 Jul 2026

Epidurals during labor show no significant risks to newborns

Having an epidural during labor is not associated with clinically significant increased risks of harm to newborn babies, including brain injury, severe breathing problems, sepsis and death, or cerebral palsy later in childhood.

15 Jul 2026