['infertility']
['intrauterine injection of uhcg', 'placebo']

        Inclusion Criteria:

          1. Patients with history of one fresh embryo transfer failure

          2. Patients with Primary infertility

          3. Patients with at least one embryo with excellent quality

        Exclusion Criteria:

        1. Female age over 40 years old 2- Severe male factor (Azoospermia) 3- Endometriosis
        diagnosis and the presence of hydrosalpinges 4- Uterine factor ( polyps, myoma and previous
        myomectomy, …) 5- Patients with polycystic ovarian syndrome diagnosis 6- Cases with
        pre-implantation genetic diagnosis (PGD)indication 7- Cases with difficult embryo transfer
        or use of Tenaculum 8- Patients with repeated implantation failures and repeated
        miscarriages. 9- Female smokers
      