An IVF technique which uses timelapse imaging could significantly increase the chances of a successful birth, scientists have said.
Researchers used the method to select low risk embryos which looked unlikely to have abnormalities.
The imaging can spot delays in the embryo's development at crucial stages and a condition called aneuploidy, where it can have extra or missing chromosomes.
It is common in human embryos and a major cause of fertility treatment failure and miscarriage.
ITV News' Nina Nannar reports:
Stuart Lavery, consultant gynaecologist and director of IVF at Hammersmith Hospital, London, said: "Time lapse imaging of the early development of human embryos offers the exciting potential of a novel and non-invasive way of selecting the embryo with the greatest chance of implantation outside the womb."
Despite the optimism, some experts are counselling caution, Sue Avery, director of Birmingham Women's Fertility Centre, said:
"The IVF community needs a prospective randomised controlled trial to prove that the new approach delivers better results before it can be recommended to patients."