Tag

Sperm

All articles tagged with #sperm

health15 days ago•2 min saved

Air pollution may reprogram sperm DNA, raising fertility concerns

A large fertility study following over 2,000 men links exposure to outdoor pollutants (notably ozone and nitrogen dioxide) during sperm development to subtle DNA methylation changes in sperm that regulate gene activity. Researchers identified 39 pollution-associated DNA changes, including in the GNAS gene, suggesting a potential mechanism by which air pollution could affect fertility. However, a direct link to infertility has not been proven, and further work is needed to confirm clinical significance.

via The Guardian|

#air-pollution #environmental-health #epigenetics

health1 month ago•5 min saved

GLP-1 Weight-Loss Drugs Show Potential to Improve Male Fertility, Study Finds

A UK study suggests GLP-1 weight-loss drugs (dulaglutide, liraglutide, semaglutide) may improve male fertility markers—boosting testosterone and sperm quality—primarily through weight loss. Liraglutide increased testosterone, LH and FSH and improved sperm parameters; semaglutide improved sperm morphology; dulaglutide showed no significant hormonal changes. Researchers caution that benefits appear indirect and larger studies are needed; GLP-1s should not be used specifically for fertility.

via New York Post|

#fertility #glp-1 #health

health1 month ago•186 min saved

GLP-1 weight-loss drugs linked to improved male fertility in a 24-week study

A CNN Health summary reports that men aged 18–65 with high BMI who took GLP-1 medications (used for diabetes and weight loss) for 24 weeks showed higher testosterone, increased sperm count, and better sperm quality. While findings hint at fertility benefits and potential as an alternative to testosterone therapy, experts caution that more research is needed and results may not apply to all men. Benefits may stem from weight loss and reduced inflammation, but clinicians emphasize fertility evaluations and ongoing healthy lifestyle choices, as weight loss alone does not guarantee improved fertility.

via CNN|

#fertility #glp-1 #health

celebrity1 month ago•474 min saved

Khloé Kardashian Secures Tristan Thompson's Embryos and Keeps His Sperm Banked

Khloé Kardashian reveals on The Cut that Tristan Thompson signed over some of his frozen embryos to her after he had a vasectomy, effectively giving her ownership of his sperm; Thompson says he's done having kids unless they're from Kardashian's embryos, while Kardashian notes she’s preserving sperm for a future possibility, and the couple share two children, True and Tatum.

via The Cut|

#celebrity #embryos #khloe-kardashian

health2 months ago•8 min saved

Cannabis use linked to lower sperm quality in men, experts say

Cannabis use, especially heavy and chronic use, may impair male fertility by lowering sperm count and mobility and altering reproductive hormones; human studies link cannabis to reduced semen quality, though evidence is mixed; experts say stopping cannabis for at least three months before attempting conception can improve fertility, highlighting that male infertility is common and under‑evaluated.

via Fox News|

#cannabis #endocannabinoid-system #health

health3 months ago•6 min saved

Chronic stress can quietly erode a man's fertility

Chronic stress can disrupt hormones and increase oxidative stress, which may lower sperm count, motility and morphology. Because sperm development takes 2–3 months, prolonged stress can affect future semen samples. It often coexists with poor sleep, weight gain and higher substance use, so fertility is usually multi-factorial. A semen analysis is a common first step; improving sleep (7–9 hours), regular activity, weight management, and reducing nicotine/alcohol can help, alongside medical evaluation for underlying issues.

via CNN|

#fertility #health #lifestyle

science3 months ago•34 min saved

Cosmic parenthood in doubt as space-like microgravity halves sperm navigation

New microgravity experiments using a tiny obstacle course showed human and mouse sperm navigated about 50% less effectively in space-like conditions, resulting in roughly a 30% drop in fertilization. While some sperm still reach the egg and may form higher-quality embryos, embryo development in weightlessness could pose major challenges, suggesting space reproduction may be possible only for the fittest sperm and with careful embryo protection as NASA pursues Moon and Mars settlements.

via Yahoo|

#embryo-development #microgravity #reproduction

science3 months ago•24 min saved

Space Sperm Need Gravity to Find Their Way

Adelaide University researchers tested human, mouse, and pig sperm in a device simulating microgravity, finding that sperm struggled to navigate a maze mimicking the female reproductive tract and showing about a 30% reduction in successful navigation under zero gravity, underscoring gravity as a key factor in early reproductive success during space conditions.

via OutKick|

#reproduction #science #space-travel

health3 months ago•16 min saved

Frequent Ejaculation Linked to Healthier Sperm, Review Finds

A review of nearly 150 studies finds that regular ejaculation or sex can help sperm quality, while abstinence modestly degrades it via increased oxidative stress and DNA damage, reducing viability and motility in humans and other animals. A recent IVF trial suggested higher fertilization success when men ejaculate within 48 hours of sample collection, though the impact on natural fertility remains unclear. The findings could lead clinics to reassess abstinence guidelines and emphasize sperm quality alongside quantity, while general health benefits of regular sexual activity appear unaffected.

via gizmodo.com|

#abstinence #fertility #health

science3 months ago•4 min saved

Sperm Lose Direction in Microgravity, Raising Spaceflight Reproduction Concerns

Researchers used a 3D clinostat to simulate microgravity and tested human, pig, and mouse sperm in a channel resembling the female reproductive tract; they found a significant drop in the number of sperm reaching the egg under microgravity, not due to motor changes but impaired direction sensing; fertilization dropped about 30% after four hours of exposure, with longer exposure causing delays and fewer embryos; progesterone could still guide sperm, indicating chemotaxis remains important; the findings, published in Communications Biology, imply spaceflight could affect reproductive outcomes in humans and livestock, highlighting the need for further research.

via ScienceAlert|

#fertilization #microgravity #reproduction

space3 months ago•3 min saved

Sperm Lose Direction in Microgravity, Prompting Space Reproduction Research

Australian researchers used a clinostat to simulate microgravity and found human, mouse, and pig sperm become disoriented, with about a 40% drop in those reaching a simulated egg; microgravity also affected early embryo development in animals, though healthy embryos could form, and progesterone helped guide sperm. The findings underscore the importance of understanding reproduction in space for future Moon/Mars settlements and ongoing space biology programs, while noting radiation and ethical considerations remain challenges.

via The Guardian|

#adelaide-university #microgravity #reproduction

health3 months ago•3 min saved

Frequent ejaculation linked to a small fertility boost, study finds

A large meta-analysis across human and non-human studies shows that regular ejaculation helps prevent rapid deterioration of stored sperm, with longer abstinence associated with increased DNA damage and reduced motility. The findings suggest a modest fertility benefit from frequent ejaculation and hint that ejaculation timing could influence IVF success; current guidelines allowing up to seven days between samples may warrant revision.

via Euronews.com|

#ejaculation #fertility #health

science5 months ago•3 min saved

Termite Monogamy Triggers Sperm-Tail Loss and Social Shift

A study finds that long-term monogamy in termites reduced sperm competition, leading to the loss of sperm-motility genes and enabling a shift from solitary ancestors to highly social colonies, showing that social complexity can arise by pruning genetic complexity.

via ScienceAlert|

#evolution #genetics #monogamy

science6 months ago•12 min saved

Sperm RNA Clock Reveals Mid-Life Aging Cliff Linked to Child Health

A new EMBO Journal study reports a mid-life, abrupt shift in sperm RNA—an “aging cliff”—that could influence what fathers pass to their offspring, offering a mechanism beyond DNA mutations that may help explain increased risks of neurodevelopmental and metabolic issues in children of older dads and supporting aging-related cautions in assisted reproduction.

via ZME Science|

#aging #neurodevelopment #paternalage

science7 months ago•6 min saved

Rapid Mutations in Aging Sperm Surprise Scientists

New research shows that harmful genetic mutations in sperm increase with age and are actively favored during sperm production, raising genetic risks for offspring as men grow older, with some mutations linked to serious diseases and cancer, and evidence of natural selection within the testes influencing mutation rates.

via SciTechDaily|

#aging #genetic-risk #mutations