Back ground: A single dose of GnRH analogue in the luteal phase is reported to improve the
outcome of IVF/ICSI treatments but the effect in FET cycles has not been reported.
Aim: To compare the results of frozen thawed embryo transfers with and without GnRHa analogue
support Primary end point: IR, PR, on going PR Secondary end point: hCH, E2 and progesterone
levels 14 days after thawing