There have been two very common forms of progesterone administration that have been used
during ovulation induction, in vitro fertilization (IVF) and embryo transfers. There are
currently no randomized clinical trials to demonstrate which method of progesterone
administration is more effective for frozen embryo transfer. We raise the question: Is there
a difference between the two accepted methods of progesterone administration, intramuscular
and vaginal suppositories, for frozen embryo transfer? Studies for fresh embryo transfer
after in vitro fertilization, have demonstrated that there is not a difference between the
two methods of progesterone administration. We will evaluate the question for frozen embryo
transfer.