Twin pregnancy following embryo transfer on day 7 of the luteal phase in an oocyte donation programme.

We report a case of a 42 year old female patient with hypergonadotrophic hypogonadism requiring oocyte donation. Spontaneous ovulation occurred during a hormonal replacement treatment cycle and three embryos were transferred 7 days after documented ovulation. This resulted in a viable twin pregnancy. The twins were genetically distinct from the mother. To the best of our knowledge this is the first reported case of a successful transfer of embryos on day 7 of the luteal phase leading to a viable pregnancy in an oocyte donation programme.