HOME >> MEDICINE >> NEWS
There are a few 'safe' days in menstrual cycle

Guidelines for getting pregnant -- or avoiding pregnancy -- usually assume an average woman is fertile between days 10 and 17 of her menstrual cycle. But researchers at the National Institute of Environmental Health Sciences have demonstrated what some accidentally pregnant women may have long suspected: Only about 30 percent of women actually have their fertile window entirely within that timespan.

In fact, the researchers found, there is hardly a day in the menstrual cycle during which some women are not potentially fertile. Women in this study were of prime reproductive age (most between 25 and 35), when the menstrual cycles are most regular. Because teenagers and women approaching menopause have less regular cycles, their windows of fertility might be even more unpredictable.

Describing data from nearly 700 menstrual cycles of 213 healthy North Carolina women, NIEHS' Allen J. Wilcox, M.D., Ph.D., statistician David Dunson, Ph.D., and epidemiologist Donna Day Baird, Ph.D., reported in the British Medical Journal (Vol. 321, pp 1259-1262) that the timing of women's fertile window "can be highly unpredictable, even if their cycles are usually regular."

Dr. Wilcox, a physician and chief of epidemiology at NIEHS, said, "If the average healthy couple wants to get pregnant, they are just as well off to forget 'fertile windows' and simply engage in unprotected intercourse two or three times a week." As for those seeking to use the cycle to avoid pregnancy, the odds are not good. "Our data suggest there are few days of the menstrual cycle during which some women are not potentially capable of becoming pregnant - including even the day on which they may expect their next menses to begin," according to the new scientific report.

With cycle day one being the day of the actual onset of menstrual bleeding, the researchers showed that 2 percent of women were starting their fertile window by day four, 17 percent by day seven. More tha
'"/>

Contact: Bill Grigg
grigg@niehs.nih.gov
301-402-3378
NIH/National Institute of Environmental Health Sciences
16-Nov-2000


Page: 1 2

Related medicine news :

1. Will an apple a day keep the doctor away? There are better food choices, research notes
2. Deaths Related To Intrapartum Asphyxia - Is There A Problem With Prevention?
3. Air pollution, even at safe levels, is bad for the heart
4. Scientific forum addresses menstrual cycle as vital sign
5. Heavy menstrual periods associated with economic loss
6. Causes of menstrual migraine explored
7. Energy balance, not exercise, key to athletic menstrual disturbance
8. Investigational oral contraceptive reduces premenstrual and menstrual symptoms
9. Tracing the life cycle of a manmade disease
10. Urban hospitals bear the brunt of motorcycle injuries
11. Weekly cycles of once-daily anti-HIV drugs could reduce cost of HIV treatment

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: There are few safe days menstrual cycle

(Date:8/23/2014)... Pixel Film Studios, a leader of Final Cut ... ProIntro Vol.3, a customizable title tool for FCPX ... by dragging ProIntro Vol.3 in their timeline" says Christina Austin, ... time saver and i think our users will agree" , ... titles made with Final Cut Pro X users in mind. ...
(Date:8/23/2014)... August 23, 2014 Teen drug and ... It’s no different in Wilmington, NC. Substance abuse can ... falling victim to drug and alcohol dependency in higher ... looking to overcome substance abuse, but don’t know where ... treatment facility can be a challenge because most treatment ...
(Date:8/22/2014)... 23, 2014 The IT manager of ... hosting for several years. He has recently announced that ... hosting suppliers in 2014. , GoDaddy is a popular ... features and great hosting solutions at affordable rates. It ... for shared hosting plans depend on the length of ...
(Date:8/22/2014)... Park City, UT (PRWEB) August 22, 2014 ... Solution, published a new guide on Account-Based Health Plans. ... health plans (ABHPs) as a strategy to lower the ... the different types of medical spending accounts, however, can ... easy-to-understand comparison chart to learn the four main types ...
(Date:8/22/2014)... Recently, UWDress.com, a leading online supplier of wedding dresses and ... empire bridesmaid dresses to its product line. In ... for these high quality items. All of them are now ... off. , The company’s new items can definitely add ... its website. It is true that all its products are ...
Breaking Medicine News(10 mins):Health News:A new plugin was announced today, ProIntro Vol.3 from Pixel Film Studios for Final Cut Pro X 2Health News:Troubled Teens Wilmington Helpline Guides Adolescents to the Path of Recovery 2Health News:Discounted Empire Bridesmaid Dresses Online At UWDress.com 2
(Date:8/21/2014)... , Aug. 21, 2014  Vermillion, Inc. (NASDAQ: ... gynecologic cancers and women,s health, has appointed Holly ... Managed Markets. Ms. Bauzon has a proven ... payer coverage for laboratory services companies. She has more ... PerkinElmer, Inc., where she held the position of Director, ...
(Date:8/21/2014)... AUSTIN, Texas , Aug. 21, 2014 /PRNewswire/ ... IT services company, announced today that it has ... Records (EMR) solution for Plastic Surgery and Dermatology ... provide even more value to healthcare practices using ... CEO of eRelevance Corporation. "Using information from the ...
(Date:8/21/2014)... , Aug. 21, 2014  Publicis Groupe customer ... , Managing Partner and Healthcare Industry Group Leader, has ... which recognizes the most inspiring people in the life-sciences ... in research and development, marketing, technology, creativity, strategy and ... 2006 as a partner in its leading Rosetta Consulting ...
Breaking Medicine Technology:Vermillion Appoints Holly B. Bauzon as VP of Sales and Managed Markets 2eRelevance Corporation Integrates with Nextech Electronic Medical Records 2Shannon Hartley Shines in PharmaVOICE 100 2
Cached News: