Monday, June 30th, 2014
Many men who are facing “male factor infertility” because their sperm’s size and shape is not of a high enough quality to fertilize a woman’s egg and help her become pregnant turn to lifestyle changes like losing weight or quitting smoking or drinking alcohol. But a new study published in the journal Human Reproduction has found that those lifestyle adjustments–while a good idea for men who want to be healthier and lower their risk of other health conditions–aren’t likely to help solve their sperm quality issues.
Other factors, including smoking marijuana, were found to lower sperm quality, as was collecting samples during the hot summer months. And the size and shape of sperm–known as “morphology”–was better among men who had abstained from sexual activity for a few days before collection. Reuters has more:
The researchers found that men were about twice as likely to have abnormal sperm if the sample was collected during the summer. They were also more likely to have abnormal sperm if they were young and smoked marijuana.
Although most other medical and lifestyle factors, such as cigarette smoking and alcohol consumption, didn’t seem to be linked to sperm morphology, Smith said he still would advise his patients to be as healthy as possible.
“Marijuana is certainly a potential worrisome risk factor for hurting sperm quality,” he said. “I’d tell my patients to stop smoking marijuana. I wouldn’t say to my patient to go out and do whatever you want because it won’t make a difference. To me, that would be overstating those results.”
The researchers also caution that the men included in the study may not be representative of all couples with fertility problems.
Smith said a better study would be to focus on whether the couples went on to conceive a child.
Image: Man eating a salad, via Shutterstock
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Friday, October 18th, 2013
A diet heavy in bacon and other processed meats may raise a man’s risk of having poor sperm and semen quality, whereas a diet rich in fish could boost male fertility, according to a new study published in the journal Fertility and Sterility. More from CNN:
Myriam Afeiche, research fellow at the Harvard School of Public Health, and her colleagues looked at how types of meat could be associated with semen quality. They took samples from 156 men at the Massachusetts General Hospital Fertility Center in Boston and had the men answer a questionnaire about their eating habits.
What does semen have to look like to be considered high-quality? The researchers considered four main parameters:
The concentration of sperm is one part of it. So is motility, or how fast the sperm move. The shape of the sperm also matters, as does the total sperm count – that’s the concentration multiplied by volume.
The researchers did not look at individual kinds of processed meat, so this study won’t tell you if bacon could be more sperm-stunting than hamburgers, or vice versa. But higher intake of processed meat appeared to be related to a lower percent of “morphologically normal” – or well-shaped – sperm.
Regarding fish, it seemed that men who ate more dark meat fish – such as salmon, bluefish and tuna – had higher total sperm count; more white meat fish – such as cod and halibut – was associated with normally-shaped sperm.
The researchers only looked at associations, not causes. It is unclear whether processed meat actually causes changes in sperm, or if it does, how that would happen. It’s possible men who eat more processed meat have an unhealthier diet overall, which could affect their semen. Same goes for fish intake and sperm; researchers don’t know what about fish may benefit the littler swimmers.
“There might be something else going on, but we’re not sure what it is,” Afeiche said.
Trying to get pregnant? Find out if you are maximizing your fertility, or predict your due date.
Image: Bacon, via Shutterstock
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