IVF test improves chances of implantation by pinpointing fertility window

Clinical trials underway after scientists in Madrid pioneer technique which homes in on woman's optimum time for treatment

Thousands of infertile couples could benefit from a new test that tailors the timing of IVF treatment to a woman's individual cycle for the first time.

The scientists behind the technique believe that IVF frequently fails because the embryo is transferred at the wrong time, missing a crucial fertility window.