Navigation Links
Twin Brother may Reduce Sister's Fertility by 25 Percent

Sheffield University researchers say that a woman who has a twin brother is likely to have 25 per cent reduced fertility. A study conducted by them, published in the Proceedings of the National Academy of Sciences, blames exposure to male hormone testosterone in the womb for this.

Lead researcher Dr Virpi Lummaa tells that both testosterone and the female hormone oestrogen can cross the womb, due to which the twin brother and sister are exposed to each other's hormones. Since male and female foetuses have similar oestrogen levels, the female child is more likely to be affected, she says.

With a view to determine the effects of testosterone on female fertility, the researchers studied Finnish medical records spanning 1734 to 1888. The pre-industrial population was chosen because advanced healthcare and assisted conception treatments like IVF could have skewed fertility data on modern Western societies.

It was observed that of 754 twins, females with a twin brother were 25 per cent less likely to have children than females with a twin sister. The researchers also noted that women with a male twin were 15 per cent less likely to marry.

The findings could have resulted because, says Dr. Lummaa, females exposed to a male twin had developed masculine traits, attitudes and behaviours that affected their decision to get married. She says that exposure to high levels of testosterone in the womb increases the risk of diseases that compromise fertility, such as reproductive cancers.

"As a consequence of a male twin's influence on a female's fertility, mothers who produce opposite sex twins have fewer grandchildren and hence lower evolutionary fitness," the BBC quoted her as saying.

The researchers say that experiments on animals have shown evidence that testosterone may potentially damage female fertility.

They, however, admitted that more research was needed to look at this mechanis
'"/>




Page: 1 2

Related medicine news :

1. Heart Transplant Twin Recovering, But Brother Critical
2. Big Brother Star Pete Burns, Checks Into a Mental Health Clinic
3. Big Brother to the Rescue
4. Disabled Orissa Brothers Lives Saved by Timely Intervention
5. Reduced POD linked to fatal asthma attacks
6. Reduced fertility in men who mountain bike
7. Reduce watching TV to prevent Obesity and Diabetes
8. Mammograms Reduce Risk of Dying
9. Night Time Aspirin Regimen Found to Reduce Blood Pressure
10. Reduced Fatigue Boosts Mental Health
11. Gynecological Surgeries Reduce Cancer Risk
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Twin Brother may Reduce Sister Fertility Percent

(Date:9/16/2014)... NY (PRWEB) September 16, 2014 Seven ... around the world will be honored in New York ... ( http://www.worldofchildren.org ), the only global recognition and funding ... , Hailed by the media as the “Nobel Prize ... have each created life-changing programs that benefit children in ...
(Date:9/16/2014)... Silver Spring, Md. (PRWEB) September 16, 2014 ... University of Colorado Anschutz Medical Campus and Children’s ... 2014. PHA is the country’s leading pulmonary hypertension association ... hypertension (PH) – a disease of the lungs that affects ... heart failure. Without treatment, mean survivability is only 2.8 years. ...
(Date:9/16/2014)... 2014 As part of its Latinos ... Citizens (LULAC) will host the second annual health festival ... feature free health screenings for osteoporosis, HIV, and high ... and cholesterol levels as well as bone marrow typing. ... under 6 years old , The event will also ...
(Date:9/16/2014)... -- Including women older than 70 in national breast ... in advanced forms of the disease, a new study ... could result in older women being overdiagnosed and overtreated, ... screen older women for breast cancer should be made ... using mass screening, the decision to participate in the ...
(Date:9/16/2014)... HealthDay Reporter TUESDAY, ... U.S. cancer survivors are alive today, compared to just ... Research reported Tuesday. These individuals amount to 4 ... of childhood cancer, according to the association,s annual progress ... and treatment of cancer and details some of the ...
Breaking Medicine News(10 mins):Health News:World of Children® Award Announces 2014 Honorees 2Health News:World of Children® Award Announces 2014 Honorees 3Health News:World of Children® Award Announces 2014 Honorees 4Health News:World of Children® Award Announces 2014 Honorees 5Health News:World of Children® Award Announces 2014 Honorees 6Health News:World of Children® Award Announces 2014 Honorees 7Health News:World of Children® Award Announces 2014 Honorees 8Health News:Help Fight Pulmonary Hypertension at the Colorado PH in the Park 2014 2Health News:LULAC Hosts Second Annual Latinos Living Healthy Feria de Salud in Los Angeles 2Health News:Some Benefits of Screening Elderly Women for Breast Cancer Questioned 2Health News:Targeted Drugs Among Successes Against Cancer, Says New Report 2Health News:Targeted Drugs Among Successes Against Cancer, Says New Report 3Health News:Targeted Drugs Among Successes Against Cancer, Says New Report 4
... to country,s high rate of premature births , ... of infant mortality, the United States lags dismally behind ... high number of babies delivered prematurely, according to a ... 30th in the world in infant mortality," said Marian ...
... - Treating limited stage small cell lung cancer(LSCL) with ... shown encouraging results, opening the door to larger scale ... Texas M. D. Anderson Cancer Center. The Phase ... oral session at the annual meeting of the American ...
... ... videos as part of a new section on its website called "Baptist Medical News ... pediatric patients. As part the new portion of Baptist,s website to integrate video of ... , ...
... SHENZHEN, China, Nov. 3 /PRNewswire-Asia-FirstCall/ -- China Nepstar Chain,Drugstore ... the largest,drugstore chain in China based on the number of ... strategic cooperation agreement,with ATMU (China) Technology Co., Ltd., a subsidiary ... to install ATMs in Nepstar stores. , ...
... and tackling so-called neglected tropical diseases are the focus ... . The articles, by leading global health experts from ... dramatically, rising to meet them could save millions of ... with the current global economic slowdown, portends a drastic ...
... ... its services nationally through strengthening its outreach programs. , ... (PRWEB) November 3, 2009 -- ... preparatory school committed to experiential education and transformative therapeutics. The school embraces virtuous ...
Cached Medicine News:Health News:CDC Finds U.S. 30th in Infant Mortality 2Health News:CDC Finds U.S. 30th in Infant Mortality 3Health News:Study of concurrent radiotherapy, chemotherapy shows promise in small cell lung cancer 2Health News:Study of concurrent radiotherapy, chemotherapy shows promise in small cell lung cancer 3Health News:New Video Post Shows Minimally Invasive Procedure To Correct Sunken Chest Syndrome 2Health News:China Nepstar Enters Into Strategic Cooperation Agreement with ATMU to Install More Than 1,000 ATMs in Nepstar Stores 2Health News:China Nepstar Enters Into Strategic Cooperation Agreement with ATMU to Install More Than 1,000 ATMs in Nepstar Stores 3Health News:Global challenges and opportunities in fighting HIV/AIDS and neglected diseases 2Health News:Global challenges and opportunities in fighting HIV/AIDS and neglected diseases 3Health News:Global challenges and opportunities in fighting HIV/AIDS and neglected diseases 4Health News:Global challenges and opportunities in fighting HIV/AIDS and neglected diseases 5Health News:Therapeutic Boarding School to Provide Services Nationally 2
(Date:9/16/2014)... 16, 2014   HemCon Medical Technologies, Inc. ... TriStar Wellness Solutions(R), Inc. (OTCQB: TWSI) and ... products, announced today that the revenue performance on ... percent, and microdispersed oxidized cellulose raw material is ... TWSI expects third quarter revenues to surpass the ...
(Date:9/16/2014)... On September 25 to 26, 2014, ... design and manufacturing - MEDTEC China  - will mark ... & Convention Center, bringing together close to 300 leading ... their latest medical-grade raw materials, parts and processing technologies. ... for free visitor pre-registration to be completed. To date, ...
(Date:9/16/2014)... Sept. 16, 2014 Based on its ... Frost & Sullivan recognises Incisive Surgical with the ... Value Leadership. Incisive Surgical,s uniquely-designed, innovative INSORB® Absorbable ... eliminates the need for patients to undergo the ... removal  that may result in increased pain, wound ...
Breaking Medicine Technology:HemCon Medical Technologies, Inc. Projects Strong Third Quarter Revenues 2HemCon Medical Technologies, Inc. Projects Strong Third Quarter Revenues 3HemCon Medical Technologies, Inc. Projects Strong Third Quarter Revenues 4MEDTEC China 2014: Seven Highlights Not to Miss! 2MEDTEC China 2014: Seven Highlights Not to Miss! 3MEDTEC China 2014: Seven Highlights Not to Miss! 4Frost & Sullivan Commends Incisive Surgical for Delivering Superior Customer Value through its Patient-Centric, Cost-Effective INSORB Absorbable Stapler 2Frost & Sullivan Commends Incisive Surgical for Delivering Superior Customer Value through its Patient-Centric, Cost-Effective INSORB Absorbable Stapler 3Frost & Sullivan Commends Incisive Surgical for Delivering Superior Customer Value through its Patient-Centric, Cost-Effective INSORB Absorbable Stapler 4Frost & Sullivan Commends Incisive Surgical for Delivering Superior Customer Value through its Patient-Centric, Cost-Effective INSORB Absorbable Stapler 5
The Pinn-ACL Femoral Guide is offered in right and left versions and is designed to easily accommodate unusually large or small knees....
Hand surgery basic instrument set...
Needle holder, delicate, curved without lock...
Dilator...
Medicine Products: