A comparison of pregnancy rates for 131 donor oocyte transfers using either a sequential or fixed regime of steroid replacement therapy.

This study describes the overall results of 131 donor oocyte transfers between 1982 and 1989 when 30 pregnancies resulted (23% pregnancy rate/transfer). A retrospective comparison of results between an earlier sequential hormone replacement regime and a more recent low dosage, variable length oestrogen replacement shows that the latter offers greater flexibility and a promising trend towards higher pregnancy rates.