A new in vitro fertilisation trial has been established to test the effectiveness of a frozen embryo transfer.

At present, women undergoing IVF have fresh embryos implanted after stimulating the ovaries to produce more eggs through the use of hormones.

Still, if the first cycle is unsuccessful, any collected embryos that are not immediately used are frozen and can be implanted at a later date, or after a successful pregnancy for patients trying to have another baby.

IVF clinic Genea claims its success rates for frozen embryos are now on par with fresh embryos.

The trial is investigating the advantages of transferring a frozen embryo into the uterus during a natural menstrual cycle rather than straight after the use of hormone drugs, when the lining of the uterus might not be as receptive.

The transfer of a fresh rather than a frozen embryo has been the traditional model for IVF and is promoted by some clinics as the  ultimate standard.

But the best and quickest way to achieve a healthy baby may be from transferring a single frozen and thawed embryo.

The research involves 200 patients, and comes after an Australian study published last month found that birth defects were significantly decreased among IVF babies conceived from a frozen rather than a fresh embryo.

Embryo donation in NYC offers online and telephone consultations about frozen embryo transfer and other fertility treatments in and outside of the U.S.