« Giant pandas bounce back | Main | Science at the solstice »

Modern lifestyles are bad for fertility

Stress, diet and exercise can dent women’s reproductive capacity.

A combination of stress, diet and exercise can dramatically affect female fertility, research on monkeys suggests. Although stress is known to reduce fertility, researchers now warn that if a woman is also dieting and exercising, the effect could be many times greater.

Read more here

TrackBack

TrackBack URL for this entry:
http://blogs.nature.com/cgi-bin/mt/mt-tb.cgi/765

Comments

The thesis of this post is ridiculous.

Rich, educated women are very fertile. They do no have children because they believe they have better things to do with their lives. In other words, it's not biology (or stress), it's feminism.

Joaquim, in Canada

Required reading: this recent column by Linda Hirshman in the Washington Post. She writes "that women who quit their jobs to stay home with their children were making a mistake. Worse, I said that the tasks of housekeeping and child rearing were not worthy of the full time and talents of intelligent and educated human beings. They do not require a great intellect, they are not honored and they do not involve risks and the rewards that risk brings."

http://www.washingtonpost.com/wp-dyn/content/article/2006/06/16/AR2006061601766.html

I agree that low birth rates are in part due to many women chosing not to have children. It is their choice. But Ms Hirshman's opinion is just that, one woman's opinion, albeit probably influencial. There are a lot of intelligent, educated women who chose to become mother and find it very rewarding. If anything, Ms Hirshman's column highlights the need to honour their work.

My question is this: How does rich, educated women believing they have better things to do than have children account for the high rates of amenorrhoea or the results in monkeys?

From the CIA world fact book (link below), here are a few recent total birth rates (children per woman):

Afghanistan: 6.69
Gaza strip: 5.78
Nigeria: 5.49
Iraq: 4.18
United States: 2.09
Canada : 1.61
European Union: 1.47

As you can see, there is a POSITIVE relationship between war (stress) and fertility. Therefore, despite the very well known inhibition of individual female fertility by stress, stress is irrelevant at the level of human populations.

Again, the thesis of this post is ridiculous.

Joaquim, in Canada

http://www.cia.gov/cia/publications/factbook/rankorder/2127rank.html

Though it is interesting, it is to be noted that not only the stress, diet or exercise account for reduced reproduction capability. There are other factors like the genetic abnormalities, hormonal imbalance & family history.

Pre marital counselling helps the couples to be more compatible & to spend some time together, rather than a mechanical life. Apart from this, yoga & meditation can also release the pent up emotions(emotional catharisis).
So try to be natural & be what you are than trying to lead a more sophisticated life.

Well, the story, nor I, never said that women's choice doesn't impact birth rates (actually they talk about an impact on fertility). What the CIA world fact book statistics seem to show is that the more women are free to choose, the lower the birth rate. Also, the higher the level of survival stress ("will we make it until tomorrow), the higher the birth rate. Which the thesis presented does not deny. But there is a difference between that type of stress (and it's impact) and the one faced by westerners. It is that kind of day-to-day, non-life-threatening stress that was studied.

So, is the current trend of chosing to not have children, and raising pets in place of children, becoming "the norm" in the US ? I see people of other nationalities who have relocated to the US still raising families, but not people of America's "twenty-to thirty something" generation (?)

I agree that low birth rates are in part due to many women chosing not to have children. It is their choice. But Ms Hirshman's opinion is just that, one woman's opinion, albeit probably influencial. There are a lot of intelligent, educated women who chose to become mother and find it very rewarding. If anything, Ms Hirshman's column highlights the need to honour their work.

Hirshman's opinion is just that, one woman's opinion, albeit probably influencial. There are a lot of intelligent, educated women who chose to become mother and find it very rewarding. If anything, Ms Hirshman's column highlights the need to honour their work.

is the current trend of chosing to not have children, and raising pets in place of children, becoming "the norm" in the US ? I see people of other nationalities who have relocated to the US still raising families, but not people of America's "twenty-to thirty something" generation (?)

Post a comment

Comments will be reviewed by staff before being published. You can be as critical or controversial as you like, but please don't get personal or offensive, and do keep it brief. Excessively long entries may be cropped. Remember this is for feedback and discussion - not for publishing papers or press releases.

We strongly encourage you to use your real, full name. Email addresses are required: this is just in case we need to discuss your comment with you privately. They won’t be published.


Please enter the numbers you see below - this helps us to cut down on spam. Note that attempting to post within 30 seconds of hitting ‘preview’ or ‘post’ can cause the system to think you are spamming the site. If you are having trouble with this system, you can instead e-mail a comment to 'inthefield at nature.com'.