However, as the field of infertility medicine progressed the protocol drifted away from this method and began incorporating the use of fertility drugs to promote greater production of eggs during one cycle.
As only one embryo is transferred in a natural cycle, there is virtually no risk of a multiple pregnancy.
Furthermore, ovarian stimulation drugs are expensive and this means that the cost of each cycle is significantly less.
HFEA has estimated the live birth rate to be approximately 1.3% per IVF cycle using no hyperstimulation drugs for women aged between 40–42.
Some authors claim that it is safer, less expensive[7] and avoids side-effects associated with suppression of hormones in a conventional IVF cycle.
"[8] Mild IVF reduces the risk of Ovarian Hyperstimulation Syndrome (OHSS).