Sperm News and Research

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The term sperm refers to the male reproductive cells. In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell. The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell.

A father’s stress can lead to psychiatric disorders in female offspring

A study in mice conducted by researchers at Tufts University School of Medicine (TUSM) suggests that a woman's risk of anxiety and dysfunctional social behavior may depend on the experiences of her parents, particularly fathers, when they were young.

23 Aug 2012

Walnuts optimize male fertility

Eating walnuts on a daily basis seems to improve the quality of men’s sperm, show study findings.

20 Aug 2012

New birth-control strategy for mosquitoes can combat malaria

Using information about the unique mating practices of the male malaria mosquito ― which, unlike any other insect, inserts a plug to seal its sperm inside the female ― scientists are zeroing in on a birth-control drug for Anopheles mosquitoes, deadly carriers of the disease that threatens 3 billion people, has infected more than 215 million and kills 655,000 annually.

20 Aug 2012

Researchers use small molecule compound to generate reversible birth control in male mice

The development of a male contraceptive pill has long proven to be elusive, but findings from a new study may point scientists in the right direction to making oral birth control for men a reality.

17 Aug 2012

Walnuts provide key nutrients that may be essential in male reproductive health

Research published in the recent issue of Biology of Reproduction Papers-in-Press reports that 75 grams (approximately 2.5 ounces) of walnuts consumed per day improved sperm vitality, motility, and morphology (normal forms) in a group of healthy young men between 21-35 years of age.

17 Aug 2012

Scientists dissect how sperm cells of the fruit fly build their flagella

Sperm swim, lung cells sweep mucus away, and the cells in the female Fallopian tube move eggs from the ovary to the uterus. Underlying these phenomena are flagella - slender, hair-like structures extending from the surface of the cells, that bend, beat or wave rhythmically. In the latest issue of the journal Developmental Cell, scientists from the Instituto Gulbenkian de Ciência (IGC), in Portugal, have dissected how sperm cells of the fruit fly build their flagella.

14 Aug 2012

Smoking is bad for your sperm

In men with varicocele, smoking alters semen quality and sperm function as well as inducing seminal oxidative stress, report researchers.

13 Aug 2012

Research focuses on evolution of sex and gamete function

The propagation of every animal on the planet is the result of sexual activity between males and females of a given species. But how did things get this way? Why two sexes instead of one? Why are sperm necessary for reproduction and how did they evolve? These as-yet-unresolved issues fascinate Timothy Karr, a developmental geneticist and evolutionary biologist at Arizona State University's Biodesign Institute.

13 Aug 2012

Conception plans miscarry with sperm DNA damage

Sperm with damaged DNA are more likely to cause spontaneous pregnancy loss, report researchers.

30 Jul 2012

Pfizer’s Lyrica does not affect reproductive function in healthy males

Pfizer Inc. announced today that top-line results for Lyrica (pregabalin) capsules CV Study A0081104 - Assessment of the Impact of Lyrica on Sperm Production in Healthy Volunteers - demonstrate that Lyrica does not affect the reproductive function in healthy males when compared to placebo.

24 Jul 2012

Test for motile sperm improves ICSI outcomes

Researchers have developed a new sperm test that could improve pregnancy rates among women treated with intracytoplasmic sperm injection.

23 Jul 2012

Arsenic exposure impairs semen quality

Environmental exposure to arsenic significantly reduces semen quality in Chinese men, research shows.

18 Jul 2012

Risk of birth defects linked to certain jobs dads do

Several types of job carried out by future fathers may be linked to an increased risk of birth defects in their babies, suggests research published online in Occupational and Environmental Medicine.

18 Jul 2012

DRCRF names 21 new Damon Runyon Fellows

The Damon Runyon Cancer Research Foundation, a non-profit organization focused on supporting innovative early career researchers, named 21 new Damon Runyon Fellows at its spring Fellowship Award Committee review.

11 Jul 2012

Increasing obesity could cut some couples' fertility in half

As American waistlines continue to expand, research shows that increasing obesity could cut some couples' fertility in half, leading ultimately to a population decline, says one expert in fertility and obesity.

10 Jul 2012

Toxins and cell death: Interview with Professor Denise Montell

There are multiple kinds of cell death. Cells can undergo programmed cell death, which is a series of events that undergoes a predictable order at certain times during development.

6 Jul 2012

Women with higher intake of dietary saturated fats have fewer mature oocytes available for IVF

Women with a higher intake of dietary saturated fats have fewer mature oocytes available for collection in IVF, according to results of a study from the Harvard School of Public Health funded by the US National Institutes of Health.

3 Jul 2012

Massive study outlines success for assisted reproductive technology

A groundbreaking study of nearly 250,000 U.S. women reveals live birth rates approaching natural fertility can be achieved using assisted reproductive technology, where eggs are removed from a woman's ovaries, combined with sperm and then returned to the woman's body.

29 Jun 2012

Biological filter to remove estrogens from waste water and drinking water

A biological filter to remove estrogens from waste water and drinking water. The 15 Bielefeld students submitting this project to the 'international Genetically Engineered Machine competition' (iGEM) at the Massachusetts Institute of Technology (MIT) in Boston, USA are setting their sights high.

26 Jun 2012

Weight loss can reduce prevalence of low testosterone levels in men with prediabetes

Weight loss can reduce the prevalence of low testosterone levels in overweight, middle-aged men with prediabetes by almost 50 percent, a new study finds. Results will be presented Monday at The Endocrine Society's 94th Annual Meeting in Houston.

26 Jun 2012