Navigation Links
Pitt study notes decline in male births in the US and Japan

A study published in this week’s online edition of Environmental Health Perspectives reports that during the past thirty years, the number of male births has decreased each year in the U.S. and Japan. In a review of all births in both countries, the University of Pittsburgh-led study found significantly fewer boys being born relative to girls in the U.S. and Japan, and that an increasing proportion of fetuses that die are male. They note that the decline in births is equivalent to 135,000 fewer white males in the U.S. and 127,000 fewer males in Japan over the past three decades and suggest that environmental factors are one explanation for these trends.

“The pattern of decline in the ratio of male to female births remains largely unexplained,?said Devra Lee Davis, Ph.D., M.P.H., lead investigator of the study, director of the University of Pittsburgh Cancer Institute’s Center for Environmental Oncology and professor of epidemiology, University of Pittsburgh Graduate School of Public Health. “We know that men who work with some solvents, metals and pesticides father fewer baby boys. We also know that nutritional factors, physical health and chemical exposures of pregnant women affect their ability to have children and the health of their offspring. We suspect that some combination of these factors, along with older age of parents, may account for decreasing male births.?

Dr. Davis explained that environmental factors, such as prenatal exposure to endocrine- disrupting environmental pollutants may impact the SRY gene ?a gene on the Y chromosome that determines the sex of a fertilized egg. Other environmental factors that also may affect the viability of a male fetus include the parents?weight, nutrition and the use of alcohol and drugs.

In the study, Dr. Davis and her colleagues reported an overall decline of 17 males per 10,000 births in the U.S. and a decline of 37 males per 10,000 births in Japan since 1970. They also found that whi
'"/>

Source:University of Pittsburgh Schools of the Health Sciences


Page: 1 2

Related biology news :

1. Bioartificial kidney under study at MCG
2. W.M. Keck Foundation funds study of friendly microbes
3. Yellowstone microbes fueled by hydrogen, according to U. of Colorado study
4. Genome-wide mouse study yields link to human leukemia
5. Clam embryo study shows pollutant mixture adversely affects nerve cell development
6. New imaging method gives early indication if brain cancer therapy is effective, U-M study shows
7. Same mutation aided evolution in many fish species, Stanford study finds
8. Sequencing of marine bacterium will help study of cell communication
9. Genetically modified rice in China benefits farmers health, study finds
10. A new study examines how shared pathogens affect host populations
11. NYU study reveals how brains immune system fights viral encephalitis
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Pitt study notes decline male births the and Japan

(Date:4/1/2015)... Conn. , Apr. 1, 2015  NXT-ID, Inc. ... biometric authentication company focused on the growing mobile commerce ... of Wocket smart wallets is underway to early access ... access group includes usage at retail outlets including Walmart, ... Pharmacy. Users report Wocket was accepted at all outlets ...
(Date:3/31/2015)... YORK , March 31, 2015   Guidepoint ... the launch of the Post-Surgical Pain Management TRACKER, part ... products tracking usage trends in the medical device and ... access to data including treatment volumes, market share, and ... the pain associated with joint surgery. The ...
(Date:3/24/2015)... Mar. 24, 2015 Research and Markets ... "Global Iris Recognition Market 2015-2019" report to ... Iris Recognition market to grow at a CAGR of ... report covers the present scenario and the growth prospects ... 2015-2019. To calculate the market size, the report considers ...
Breaking Biology News(10 mins):NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 2NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 3NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 4Guidepoint Launches Post-Surgical Pain Management TRACKER 2Guidepoint Launches Post-Surgical Pain Management TRACKER 3Global Iris Recognition Market 2015-2019 with 3M Cogent, Bioenable Technologies, Cross Match Technology, Iris ID Systems & Safran Dominating 2
... ARTICLE #1 FOR IMMEDIATE RELEASE Evidence that inexpensive ... Energy & Fuels Amid sticker-shock fuel prices, researchers ... tests verifying that a simple, inexpensive device attached to a ... to 20 percent. That translates into several more precious miles ...
... They are used in cancer treatments, automobile sensors, ... production. However, until recently, scientists couldn,t create the ... impacts on the environment. A new method, created ... only eliminates any negative environmental impact, but also ...
... and his collaborators have developed a way to mass-produce ... less expensive. Metcalf set out to ... as phosphonates, is made in nature by bacteria. He ... have antibiotic properties. Recently, Metcalf and his lab successfully ...
Cached Biology News:American Chemical Society's Weekly PressPac -- Sept. 24, 2008 2American Chemical Society's Weekly PressPac -- Sept. 24, 2008 3American Chemical Society's Weekly PressPac -- Sept. 24, 2008 4American Chemical Society's Weekly PressPac -- Sept. 24, 2008 5American Chemical Society's Weekly PressPac -- Sept. 24, 2008 6American Chemical Society's Weekly PressPac -- Sept. 24, 2008 7American Chemical Society's Weekly PressPac -- Sept. 24, 2008 8MU scientists go green with gold, distribute environmentally friendly nanoparticles 2New way to make malaria medicine also first step in finding new antibiotics 2New way to make malaria medicine also first step in finding new antibiotics 3New way to make malaria medicine also first step in finding new antibiotics 4
(Date:4/23/2015)... April 23, 2015 Proove ... Personalized Medicine, is excited to announce the launch ... . This profile assesses 62 genetic variations to ... information for commonly prescribed non-opioid pain medications, namely ... Neurontin), alprazolam (brand name Xanax) and acetaminophen (brand ...
(Date:4/23/2015)... NY , April 23, 2015 /PRNewswire/ - Crystal ... an Executive Informational Overview ® (EIO) on Aeterna ... 52-page report is available on Crystal Research Associates, website ... on Aeterna Zentaris, website at www.aezsinc.com . ... into a specialty biopharmaceutical company in oncology, endocrinology, and ...
(Date:4/22/2015)... 23, 2015  The Heinz Family Foundation today ... Heinz Awards, which will present unrestricted cash awards ... their creativity and determination in finding solutions to ... This year,s recipients include a prolific cartoonist whose ... and personal relationships; two former Marines who are ...
(Date:4/22/2015)... 2015   MPIRICA Health Inc. , a ... Series A financing from the McQuinn Trust, an ... consumer and employer awareness of MPIRICA.com, delivering easily ... 4,800 U.S. hospitals. "As a patient ... concerned about choosing the hospital and surgeon most ...
Breaking Biology Technology:Proove Biosciences Launches World’s First Test to Predict Responders to Commonly Prescribed Non-Opioid Pain Medications 2Proove Biosciences Launches World’s First Test to Predict Responders to Commonly Prescribed Non-Opioid Pain Medications 3Crystal Research Associates, LLC Issues Executive Informational Overview (EIO) on Aeterna Zentaris Inc. 2Crystal Research Associates, LLC Issues Executive Informational Overview (EIO) on Aeterna Zentaris Inc. 3From a Scientist Who Develops Human Microlivers to a New Yorker Cartoonist Who Masterfully Depicts the Humor and Heartbreak of Everyday Life: The 20th Heinz Awards Honors Six Changemakers 2From a Scientist Who Develops Human Microlivers to a New Yorker Cartoonist Who Masterfully Depicts the Humor and Heartbreak of Everyday Life: The 20th Heinz Awards Honors Six Changemakers 3From a Scientist Who Develops Human Microlivers to a New Yorker Cartoonist Who Masterfully Depicts the Humor and Heartbreak of Everyday Life: The 20th Heinz Awards Honors Six Changemakers 4From a Scientist Who Develops Human Microlivers to a New Yorker Cartoonist Who Masterfully Depicts the Humor and Heartbreak of Everyday Life: The 20th Heinz Awards Honors Six Changemakers 5From a Scientist Who Develops Human Microlivers to a New Yorker Cartoonist Who Masterfully Depicts the Humor and Heartbreak of Everyday Life: The 20th Heinz Awards Honors Six Changemakers 6MPIRICA Health Inc. Secures $1.6M to Promote FICO-Like Quality Scores for Surgeries 2
... capable of some pretty remarkable things when they,re placed ... can even produce electricity. Driven by the vision ... team of University of Houston scientists has set out ... known as piezoelectrics, which naturally produce electricity when literally ...
... , , , ... Inc. (NYSE: BEC ) announced today that its Board of ... of outstanding common stock, payable on August 24, 2009 to all stockholders ... consecutive, quarterly payout of dividends. , , (Logo: ...
... , , ... Amgen (Nasdaq: AMGN ) and GlaxoSmithKline (GSK) today announced ... monoclonal antibody denosumab for postmenopausal osteoporosis (PMO) in Europe, Australia, New ... Amgen will commercialize the drug for PMO and oncology in ...
Cached Biology Technology:Charging ahead: University of Houston team revealing secrets of electricity-producing materials 2Charging ahead: University of Houston team revealing secrets of electricity-producing materials 3Amgen to Collaborate With GlaxoSmithKline to Commercialize Denosumab in Europe for Postmenopausal Osteoporosis (PMO) 2Amgen to Collaborate With GlaxoSmithKline to Commercialize Denosumab in Europe for Postmenopausal Osteoporosis (PMO) 3Amgen to Collaborate With GlaxoSmithKline to Commercialize Denosumab in Europe for Postmenopausal Osteoporosis (PMO) 4Amgen to Collaborate With GlaxoSmithKline to Commercialize Denosumab in Europe for Postmenopausal Osteoporosis (PMO) 5Amgen to Collaborate With GlaxoSmithKline to Commercialize Denosumab in Europe for Postmenopausal Osteoporosis (PMO) 6Amgen to Collaborate With GlaxoSmithKline to Commercialize Denosumab in Europe for Postmenopausal Osteoporosis (PMO) 7
... Biotin label transfer is fast emerging ... interaction discovery and confirmation. Until now, only ... targeted with label transfer reagents such as ... chain analog, Mts-Atf-LC-Biotin, are exciting additions to ...
... of 3 siRNAs specifically targeted to your ... product. The siTrio reagent guarantees you get ... gene when used under standard conditions (100 ... optimal transfection with one of B-Bridges controls). ...
... a compact benchtop and stackable multi-function ... with a large display screen to ... Air circulation inside to evenly distribute ... be easily calibrated from the microprocessor ...
...
Biology Products: