The infertility technique is being hailed as the biggest fertility breakthrough in 35 years.
It can be used to track a developing embryo.
Researchers at the care fertility group took thousands of photographs of embryos to pinpoint those least likely to carry chromosomal abnormalities.
Only those most likely to result in a healthy pregnancy were implanted.
The success rate with traditional in vitro is 42% for women under 35.
This new technique raises that to 61%.