IVF 'may be boosted by time-lapse embryo imaging'


CARE's chief embryologist Alison Campbell explains the benefits of time-lapse imaging

Time-lapse imaging which takes thousands of pictures of developing embryos can boost the success rate of IVF, according to British research.

The method, reported in Reproductive BioMedicine Online, can be used to select embryos at low risk of defects.

Scientists at the CARE fertility group say such informed selection can improve birth rates by 56%.

Other experts say the result is exciting, but the study of 69 couples is too small to be definitive.

The research followed the couples at the CARE fertility clinic in Manchester last year, when 88 embryos were imaged and implanted.

The embryos were put into an incubator and imaged every 10-20 minutes.

Embryo screening

Continual embryo monitoring through time-lapse imaging is aimed at selecting those with the lowest risk of aneuploidy - where the cells have chromosome abnormalities. Aneuploidy is the single biggest cause of IVF failure.

But this form of embryo screening is a predictive rather than diagnostic tool.

Couples at high risk of passing on a chromosomal abnormality may prefer to have Pre-implantation Genetic Screening. This invasive test removes cells from the early embryo for analysis. It costs around £2,500 on top of the £3,000 charged for conventional IVF.

The researchers classified the embryos as low, medium or high risk of chromosome abnormalities based on their development at certain key points.

Eleven babies were born from the low risk group (61% success rate) compared to five from the medium risk group (19% success rate) and none from those deemed high risk.

"In the 35 years I have been in this field this is probably the most exciting and significant development that can be of value to all patients seeking IVF," said Prof Simon Fishel, managing director of CARE Fertility Group.

"This technology can tell us which embryo is the most viable and has the highest potential to deliver a live birth - it will have huge potential. This is almost like having the embryo in the womb with a camera on them."

In standard IVF, embryos are removed from the incubator once a day to be checked under the microscope. This means they briefly leave their temperature-controlled environment and single daily snapshots of their development are possible.

Dr Sue Avery, British Fertility Society: "We haven't really got clear clinical evidence yet"

Using the time-lapse method embryos don't leave the incubator until they are implanted allowing 5,000 images to be taken.

"Removing embryos from the incubator potentially exposes them to damage, so it must be a good thing to be able to look at the pattern of development over time.

"These results are very interesting but this is is a very small study and any interpretation of the findings must be made with caution as we are dealing with the hopes and expectations of patients," said Dr Virginia Bolton from the assisted conception unit at Guy's and St Thomas' NHS Foundation Trust.

Sheena Lewis, professor of reproductive medicine at Queen's University, Belfast, said: "This may well be the technique we have been waiting for to improve embryo selection and thus success in fertility treatment.

"However, this is a small study with just 46 embryos being followed through to birth. Much more research will be needed before this becomes a routine clinical tool."

Around a dozen private and NHS clinics are using time-lapse embryo imaging. It costs around £750 in addition to about £3,000 for IVF.

Fergus Walsh Article written by Fergus Walsh Fergus Walsh Medical correspondent

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  • rate this

    Comment number 22.

    We should not interfere in Gods creation. It is not for us to tamper with the mechanism which has been designed by Him for us.

    Psalm 139:13
    For you formed my inward parts; you knitted me together in my mother's womb.

  • rate this

    Comment number 35.

    This all sounds very interesting, but we're completely forgetting the fact that IVF is highly unethical and should be banned.

  • rate this

    Comment number 71.

    Do conventional sex! Soon, we will swallow "orgasm tablets" which bring us a supreme bliss or satisfaction and our babies will be produced in a factories similar to that of car makers!

  • rate this

    Comment number 41.

    Off course, this being within the remit of the NHS, aka cash cow, more money for more scientific benefits I just do not get; this is yet another way where they use science to blind you, while taking your money from your wallet, without asking; it grieves me that my taxes are funding IVF; seriously, does anyone in the UK know what is going on in the real world: where there is famine, war!!!

  • rate this

    Comment number 59.

    On the other hand, we do need to continue supplying the scientists with more fodder for their trial & error pet projects; while I respect what Prof Winston has done in alleviating some of the problems of infertility; he has created a monster for the demand for IVF will not abate as more women leave child bearing till their 30/40s; the best age to have your children is in your twenties!


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