IVF defects higher than expected

Many eggs used for IVF carry genetic errors that can cause miscarriage, even those from young women, experts say.

Given the findings of three US studies presented at a fertility meeting in Montreal, some believe all eggs used for IVF should be screened for defects.

UK fertility guidelines recommend such screening only for women over 35 or women who have had repeated miscarriages or failed IVF attempts.

The screening involves testing a single cell from a three-day-old embryo.

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