The conception rate depends on the number of embryo's implanted. A maximum of 3 is recommended. Results are:
There is little difference overall between GIFT, IVF or ZIFT.
The cryopreservation of excess pre-embryonic eggs may substantially increase the ultimate pregnancy rate in some women.
It is estimated that successive attempts at assisted reproduction lead to a cumulative pregnancy rate of 80%. However, most couples do not undertake sufficient cycles to realise this.
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