Reproductive Hormones News and Research

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Women with shorter reproductive lifespan face higher risk of developing bronchiectasis

Women with a shorter reproductive lifespan are at greater risk of developing bronchiectasis, according to a new study in the July 2026 issue of Chronic Obstructive Pulmonary Diseases: Journal of the COPD Foundation, a peer-reviewed, open access journal.

27 Aug 2026

Higher BPA exposure tracked with higher estrogen and progesterone in women

Researchers found that higher urinary concentrations of BPA and several phthalate metabolites were associated with higher serum estrogen and progesterone levels in 90 premenopausal women from Iran. The cross-sectional study also identified positive associations for combined chemical exposures, although the authors cautioned that the mixture findings are exploratory and cannot establish causality.

24 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

Could your birth characteristics influence colorectal cancer risk?

A California study links birth and parental factors to early-onset colorectal cancer risk, highlighting male sex and Hispanic ethnicity as key contributors.

26 Jun 2026

Lifetime estrogen exposure linked to improved brain health in women

Researchers from the University of Kansas have shown a link between reproductive hormone exposure throughout life and brain health in 459 women aged 65 to 80.

23 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

Aerobic exercise mitigates nanoplastic damage in female zebrafish

Using female zebrafish as a model, researchers have found that aerobic exercise may influence various connections in the body to lessen the damaging health impacts of environmental nanoplastics.

20 May 2026

Gut-localized drug avoids systemic safety risks while reversing hormonal imbalances in mice

Polycystic ovary syndrome (PCOS) is one of the most common hormonal disorders in women of reproductive age. It can cause irregular periods, infertility, weight gain, insulin resistance, and elevated male hormone levels. Current treatments mainly focus on managing symptoms rather than addressing underlying causes.

20 May 2026

Perimenopause nearly doubles women’s odds of poor heart health

Perimenopause is linked to worsening cardiovascular health, with significant declines in lipid and glucose scores, emphasizing the need for early assessment.

15 May 2026

AI-driven hormone tracking could help detect infertility early and improve conception

Men and women who appear hormonally 'normal' may still have undetected disruptions in the timing and coordination of their reproductive hormones that could impair fertility, according to research presented at the 28th European Congress of Endocrinology in Prague.

8 May 2026

Can ketogenic diets help PCOS? New analysis points to weight and insulin gains

A systematic review and meta-analysis of 15 studies found that ketogenic diets were associated with short-term reductions in body weight, waist circumference, insulin resistance, and some reproductive hormones in women with polycystic ovary syndrome, primarily among those with overweight or obesity. However, substantial heterogeneity, low certainty of evidence, limited safety reporting, and short follow-up periods mean the clinical effectiveness and long-term sustainability of ketogenic diets in PCOS remain uncertain.

5 Jan 2026

Study shows how ketogenic eating improves hormonal balance in PCOS

The very low-carbohydrate ketogenic diet leads to meaningful reductions in weight, visceral adiposity, insulin resistance, and androgen excess in women with PCOS based on pooled randomized trials. Benefits appear consistent across studies, though high heterogeneity, short durations, and limited safety data highlight the need for longer-term comparative research.

19 Nov 2025

New wearable sensor tracks vitamin B6 levels in sweat

Vitamin B6, which is absorbed from a broad range of foods, helps bolster immune system function and neurotransmitters in the brain.

14 Oct 2025

Lifestyle choices and hormonal imbalances can impact men's reproductive health

A new research paper was published in Volume 12 of Oncoscience on September 30, 2025, titled "Lifestyle and hormonal factors affecting semen quality and sperm DNA integrity: A cross-sectional study."

10 Oct 2025

Ultra-processed foods affect sperm quality and metabolism even without extra calories

A controlled crossover trial in Cell Metabolism found that ultra-processed foods increase weight, fat mass, LDL:HDL cholesterol, and alter reproductive hormones in men, with some effects independent of calorie load. These diets also showed trends toward reduced sperm motility, shifts in pollutants, and transient inflammatory responses, highlighting risks beyond excess calories.

31 Aug 2025

Hormonal birth control influences emotion and memory in women

Hormonal birth control is a fact of life for millions of women. In the U.S. alone, more than 60 million women of reproductive age have used contraceptives according to the Centers for Disease Control and Prevention, most often to prevent pregnancy but also to manage conditions such as endometriosis, polycystic ovary syndrome and irregular cycles.

29 Aug 2025

Vaginal microbiome fights back against stubborn BV infections

Vaginal microbiome-drug interactions affect antibiotic treatment for bacterial vaginosis, emphasizing the need for personalized approaches to enhance efficacy.

3 Jul 2025

Higher BMI, not menopause age, increases hypothyroidism risk

Researchers analyzed over 15,000 postmenopausal Canadian women to investigate whether age at natural menopause influences the risk of developing overt hypothyroidism. The study found no association, but higher BMI was linked to increased hypothyroidism risk.

29 May 2025

New review maps the impact of reproductive hormones on neurological health

A comprehensive review published today in Brain Medicine by leading neuroendocrinologist Professor Hyman M. Schipper from McGill University's Department of Neurology and Neurosurgery maps out the extensive influence of reproductive hormones on neurological health and disease.

18 Feb 2025