Friday, February 19, 2010

The Other Side of the Age & Fertility Message

Just on the heels of a study declaring that 30-year-old women have lost most of their 'good' eggs, comes a report out of the UK that women in their 30's and 40's are winding up "accidentally" pregnant because they thought their chances at pregnancy were up.

The claims being made by the British Family Planning Association (FPA) are that messages about women's age and fertility are "overplayed" and leading to something like reverse anxiety. The organization, with a mission of enabling informed sexual health choices, is heading up a new public information campaign to remind women that unless they're willing to get pregnant without trying, contraceptives should be used until after menopause.

One of the messages in the FPA campaign: "Fertility. You'd be surprised how long it takes to disappear."

Menopause is defined as not having a period for at least a year. Perimenopause is what we call the years leading up to that final menstrual period. Perimenopause can last from a couple of years to more than five, and some women are fertile throughout that time.

I'm in agreement that women should remain vigilant about their chances for pregnancy until they are clearly no longer fertile. However, to imply that the messages being sent (about women's age and the natural decrease in fertility) are anything other than appropriate is itself an overstatement.

Saturday, February 6, 2010

Translating Molecular Science: Marijuana Use Slows Down Sperm

This article in Scientific American is rather complex reading but reveals some important findings. One of the items in the piece, about study results just published in the journal Cell, is tucked in at the very end -- which is too bad, because it's a tidbit of data that even the least technical reader can grasp.

According to researcher Yurij Kirichok of the University of California at San Francisco, "Marijuana likely activates sperm prematurely, leaving them burnt out in a matter of hours."

Importantly, this study was not about marijuana's effects on male fertility. Rather, the researchers were investigating molecular components that impact how and when a sperm cell gets moving. Besides pinpointing a molecule (Hv1) that activates a resting sperm cell, they also found a few more pieces to the puzzle linking marijuana and male infertility, via endocabbinoids.

Too much medical geek talk? Just simplify it to what we typically recommend: avoiding toxins of all kinds can enhance fertility.