Specialists do recommend everyone undergoing IVF, whether it is done using own or donated eggs, to transfer one embryo in order for a multiple pregnancy to be prevented. There exist certain cases where transferring two embryos would be justified, including poor embryo quality and previous failed IVF attempts with a single embryo.
Also, given that the final decision is in the hands of the patient, sometimes younger patients who wish to have twins request a 2-embryo transfer from the beginning. The older the woman is, the higher the number of risks associated with a multiple pregnancy.
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