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Who can have the IONA<sup>®</sup> test

Twin Pregnancies

The IONA® test is suitable for twin pregnancies. However, in dichorionic (non-identical) twins, the test sensitivity is reduced from >99% to about 95%. The IONA® Software for analysis uses a specific proprietary algorithm iteration for dichorionic twins, but it will not distinguish which twin is high risk.

Fertility Assisted Pregnancies

The IONA® test takes into account the mothers age and when combined with the DNA result it gives a probability of a fetus being affected. For most fertility treatments that include a donor egg or surrogate, it is important to take into account the age of the egg donor not the mother. The IONA® test does this to give the most accurate screening result.

If you have any questions about the IONA® test, please do get in touch with us +44 (0) 161 667 6865 or This email address is being protected from spambots. You need JavaScript enabled to view it..