/span/span div style="float:right;width:305px;display:inline;font-size:13px;font-weight:400;font-style:normal;line-height:16px;" img src="http://news.bbcimg.co.uk/media/images/53842000/jpg/_53842124_twins.jpg" width="304" height="171" alt="Twin foetuses at 32 weeks"span style="width:304px;"Twin pregnancies carry risks for mother and babies/span /div div class="story-feature related narrow"Related Stories/div p class="introduction" id="story_continues_1"Experts say they have found a way to avoid the increased risk of twins that comes with having IVF without reducing the fertility procedure's success rate./p pInternationally, clinics often transfer more than one embryo per IVF cycle to boost the odds of it working. /p pBut this is riskier for both mother and child and governments, including the UK, recommend single embryo transfer./p pNow doctors say they can predict who will get pregnant with one embryo, and so only transfer more where essential./p pAt a meeting of the European Society for Human Reproduction and Embryology (ESHRE) in Stockholm, experts heard how running through a simple checklist of questions about the patient could bring down the risk of causing twins to virtually "normal"./p pIn other words, women undergoing IVF would have a one-in-50 or two per cent chance of having a twin - the same as women conceiving naturally./p pCurrently, multiple births account for over 20% of IVF births in the UK./p pUK fertility regulator the HFEA says clinics must bring this down to no more than 15% and, ultimately, it aims to cut this to 10%./ppDr Jan Holte of the Uppsala Science Park, who led the latest research, says the UK could learn from the experience of clinics in Sweden./p pOver a four-year period between 1999 and 2002, Dr Holte and his colleagues analysed over 3,000 of the IVF cycles performed at their clinic, taking note of different factors that played a role in the treatment's success./p div class="story-feature wide "Twin risksAt least half of all twins are born several weeks earlier than singleton babies and so they weigh less and are more likely to experience serious health problemsTwins are up to six times more likely to die during birth or the first year of life than singletonsMothers pregnant with twins are more likely to experience health problems such as hypertension, pre-eclampsia and gestational diabetesThey are also twice as likely to die during pregnancy or birthSource: One at a Time/div p id="story_continues_2"They found four factors - age of the woman, how many eggs she produced, quality of the resultant embryo and past success or failure with IVF - could predict the chances of pregnancy./p pUsing the information, they were able to strike a balance between making sure the treatment worked and reducing the twin rate by only transferring more than one embryo when absolutely essential./p pIn this way they were able to get their twin rate down from 26% to two per cent./p pAnd, importantly, this meant better outcomes for the patients involved. Fewer babies were born prematurely and the baby death rate before, during or shortly after birth was more than halved./p pAnother clinic in Sweden has had similar success using the model, and now three more have started to use it./p pDr Holte said: "These improved outcomes were entirely due to the lower rate of twins."/p pTony Rutherford of the British Fertility Society said: "This shows that you can get the twin rate back down towards almost normal, and so taking away the risk of multiple pregnancy from assisted reproduction treatment. That is an important step forward." /p pRichard Kennedy of the International Federation of Fertility Societies said: "Multiple pregnancy is a global and avoidable issue with IVF. /p p"Fertility specialists are continually looking for ways of transferring as few embryos as possible, while maintaining the success rates of the IVF cycle."/ppThis article is from the a href="http://news.bbc.co.uk" title="Link to BBC News"BBC News website/a. © British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites./pdiv class="feedflare" a href="http://feeds.feedburner.com/~ff/bbcnewshealthfullfeed?a=PoCr-d5hME8:7qFTTOD4cpc:yIl2AUoC8zA"img src="http://feeds.feedburner.com/~ff/bbcnewshealthfullfeed?d=yIl2AUoC8zA" border="0"/img/a a href="http://feeds.feedburner.com/~ff/bbcnewshealthfullfeed?a=PoCr-d5hME8:7qFTTOD4cpc:F7zBnMyn0Lo"img src="http://feeds.feedburner.com/~ff/bbcnewshealthfullfeed?i=PoCr-d5hME8:7qFTTOD4cpc:F7zBnMyn0Lo" border="0"/img/a a href="http://feeds.feedburner.com/~ff/bbcnewshealthfullfeed?a=PoCr-d5hME8:7qFTTOD4cpc:V_sGLiPBpWU"img src="http://feeds.feedburner.com/~ff/bbcnewshealthfullfeed?i=PoCr-d5hME8:7qFTTOD4cpc:V_sGLiPBpWU" border="0"/img/a /divimg src="http://feeds.feedburner.com/~r/bbcnewshealthfullfeed/~4/PoCr-d5hME8" height="1" width="1"/