This prospective clinical trial evaluates the effect of a two dose GnRH agonist administered in the luteal phase on the outcome of ART cycles stimulated with the long GnRH agonist and GnRH antagonist protocol.

This prospective clinical trial evaluates the effect of a two dose GnRH agonist administered in the luteal phase on the outcome of ART cycles stimulated with the long GnRH agonist and GnRH antagonist protocol. Decision between each of these two protocols was subjective and depended on the clinical context.In addition to routine luteal phase support with progesterone and estradiol valerate,women received two dose of GnRH agonist on the fifth and tenth day after ET.Live birth rate was the primary outcome measure.

Inclusion Criteria:

• Couples undergoing ART with their own gametes.
• Couples having at least one good embryo available for transfer.
• Normoresponder
• Infertility etiology is unexplained
• ovulation triggered by intramuscular injection of 10000 IU of HCG

Exclusion Criteria:

Patients older than 38 years old

• High and poor responder patients