Navigation Links
Nutrition a major factor in rise in twin pregnancies

The commonly held view that IVF is the only culprit in the steady increase in the numbers of twins born over the past thirty years was challenged by a scientist speaking at the 22nd annual conference of the European Society of Human Reproduction and Embryology in Prague, Czech Republic, Wednesday 21 June 2006. Professor Robert Jansen, Medical Director of Sydney IVF, Sydney, Australia, said that his research had shown that improved nutrition, both maternal and in the lab in the case of IVF, had produced better and stronger embryos.

"Over the last 100 years, both in the UK and Australia, there has been an increase in identical twinning through the division of the embryo into two, even without IVF", he said, "and with the move to single embryo transfer with IVF this trend is obviously set to continue." Professor Jansen went on to say that the present rate of identical twinning with IVF is between one-in-a-hundred and one-in-fifty, a little over twice the rate involved when getting pregnant naturally.

Professor Jansen and his team reviewed Australian national birth statistics from 1920 to 2003 to determine the sex of babies at birth among multiple pregnancies. They found that the rate of dizygotic (DZ) twinning ?where two embryos are involved and half the twins will be of different sex - was relatively constant from 1920 until the 1960s, but there was then the well-known dramatic increase with the advent of induced ovulation and IVF ?reaching 300 in every 1000 IVF conceptions by 2000. Among monozygotic (MZ) twins, caused by embryo division (so all are of like sex), the excess rate of same-sex twins among natural conceptions has risen steadily for the last 80 years. MZ twins were relatively rare among IVF babies in the 1980s ?much less than occurs naturally ?but then rose in the nineties to reach 14 per 1000 by the year 2000.

"As IVF techniques improved there was a steady and substantial increase in MZ twinning, but starting from a low bas
'"/>

Source:European Society for Human Reproduction and Embryology


Page: 1 2 3

Related biology news :

1. Columbia research lifts major hurdle to gene therapy for cancer
2. Researchers uncover sequence of major rice pathogen
3. Emergence of cancer as major cause of childhood death in developing countries is not being adequately addressed
4. Biochemists report discovery of structure of major piece of telomerase; implications for cancer
5. Virologists make major step towards understanding the process of HIV infection
6. Biota makes major antiviral discovery
7. New gene scanning technology marks a major advance in disease research
8. LIAI scientists make major finding on potential smallpox treatment
9. MicroRNAs have shaped the evolution of the majority of mammalian genes
10. MIT: Oceans are a major gene swap-meet for plankton
11. U-M scientists identify major psoriasis susceptibility gene
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Nutrition major factor rise twin pregnancies

(Date:9/22/2014)... fishes that manufacture their own "antifreeze" proteins to ... an unfortunate side effect, researchers report: The protein-bound ... melting even when temperatures warm. , The ... the National Academy of Sciences . , "We ... of the evolution of antifreeze proteins in Antarctic ...
(Date:9/22/2014)... 2014)The Brain & Behavior Research Foundation ... Young Investigator Grants valued at more than ... most promising young scientists. Recipients of the ... will seek to identify causes, improve treatments ... that affect one in four people, including ...
(Date:9/22/2014)... more useful in homes, if they could locate people, ... with cameras and lasers, which have difficulty reliably recognizing ... clutter. A complementary way robots can "sense" what is ... frequency radio-frequency identification (UHF RFID) tags. Inexpensive self-adhesive tags ... to search a room for the correct tag,s signal, ...
Breaking Biology News(10 mins):Study: Antifreeze proteins in Antarctic fishes prevent freezingand melting 2Study: Antifreeze proteins in Antarctic fishes prevent freezingand melting 3Brain & Behavior Research Foundation awards 200 NARSAD Young Investigator grants 2New RFID technology helps robots find household objects 2New RFID technology helps robots find household objects 3
... Karen Burg and her colleagues in the Institute for ... means of studying the complex behavior of cancer cells ... way doctors treat the disease. With support from ... the researchers are building scaffolds that mimic the three-dimensional ...
... diseases is a hot area of scientific research, primarily ... the context of atherosclerotic disease. Scientists have engineered a ... about the conditions under which nanoparticles accumulate in the ... of myocardial infarction and stroke. In the research, ...
... blood platelets and bone marrow cells to deliver potentially ... genetic disorder Hurler syndrome an often fatal condition ... Scientists from Cincinnati Children,s Hospital Medical Center and the ... their unique strategy for treating the disease the week ...
Cached Biology News:In vitro innovation: Testing nanomedicine with blood cells on a microchip 2In vitro innovation: Testing nanomedicine with blood cells on a microchip 3Mouse study shows gene therapy may be possible cure for Hurler syndrome 2
(Date:9/22/2014)... 22, 2014  Neogen Corporation (Nasdaq: NEOG ... quarter of its 2015 fiscal year, which ended Aug. ... net income of $7,839,000 in the first quarter of ... Oct. 30, 2013, earnings per share in the current ... First quarter revenues increased 15% to $67,599,000, ...
(Date:9/22/2014)... September 22, 2014 The US ... mixed note as the Dow Jones Industrial Average finished ... at 4,579.79, down 0.30%. The S&P 500 finished the ... six out of ten sectors finished on a positive ... the day at 751.48, up 0.10%, with the index ...
(Date:9/22/2014)... BETHESDA, Md. , Sept. 22, 2014  Spherix Incorporated ... fostering and monetization of intellectual property, today announced that the ... patent to the Company in the month of September that ... The issued patent is: USRE45,121 , ... 2014 , Filing date: Dec 27, 2012 ...
(Date:9/21/2014)... September 21, 2014 Chemical Sciences ... challenges such as clean air and safe water, ... natural products. Chemists, environmentalists, food scientists, educators, and ... research in the field of Chemistry for the ... Sciences is one of the fastest emerging Sciences, ...
Breaking Biology Technology:Neogen reports 13% net income increase 2Neogen reports 13% net income increase 3Neogen reports 13% net income increase 4Neogen reports 13% net income increase 5Neogen reports 13% net income increase 6Neogen reports 13% net income increase 7Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 2Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 3Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 4Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 5Spherix Notified by United States Patent & Trademark Office of New Standard Essential Patent Issued to Spherix 2Spherix Notified by United States Patent & Trademark Office of New Standard Essential Patent Issued to Spherix 3Chemistry for Global Development during the Open Access Week 2Chemistry for Global Development during the Open Access Week 3
... Inc. (PDL, the Company) (NASDAQ: PDLI ) today ... other conditions, $135 million aggregate principal amount of new convertible ... statement filed with the U.S. Securities and Exchange Commission (SEC) ... the underwriters a 13-day overallotment option to purchase up to ...
... SPRING, Md., May 9, 2011 The U.S. Food and ... public relating to the development of a user fee ...   (Logo: http://photos.prnewswire.com/prnh/20090824/FDALOGO ) ... as a microorganism, plant, or animal cell, while small ...
... 2011 Accuray Incorporated (Nasdaq: ... radiosurgery, announced today that the U.S. Securities and Exchange ... Statement relating to the previously announced acquisition of TomoTherapy ... registration statement will first be mailed to TomoTherapy shareholders ...
Cached Biology Technology:PDL BioPharma, Inc. Announces Proposed $135 Million Public Offering of New Convertible Senior Notes Due 2015 2PDL BioPharma, Inc. Announces Proposed $135 Million Public Offering of New Convertible Senior Notes Due 2015 3PDL BioPharma, Inc. Announces Proposed $135 Million Public Offering of New Convertible Senior Notes Due 2015 4PDL BioPharma, Inc. Announces Proposed $135 Million Public Offering of New Convertible Senior Notes Due 2015 5FDA Requests Input on Development of User Fee Program for Biosimilar and Interchangeable Biological Products 2SEC Declares Accuray Form S-4 Registration Statement Effective in Proposed Acquisition of TomoTherapy 2SEC Declares Accuray Form S-4 Registration Statement Effective in Proposed Acquisition of TomoTherapy 3SEC Declares Accuray Form S-4 Registration Statement Effective in Proposed Acquisition of TomoTherapy 4
This antibody detects cdc42 on SDS-PAGE immunoblots....
Goat polyclonal to Nebraska Calf Diarrhea Virus (FITC) ( Abpromise for all tested applications). Antigen: Bovine (Nebraska Calf Diarrhea Virus)....
DNA fragmentation factor & Inhibitor of CAD...
Rabbit polyclonal to Methionine Aminopeptidase 2 ( Abpromise for all tested applications). entrezGeneID: 10988 SwissProtID: P50579...
Biology Products: