Editing Embryo transfer (section)

== Follow-up ==
Patients usually start progesterone medication after egg (also called oocyte) retrieval. While daily intramuscular injections of progesterone-in-oil (PIO) have been the standard route of administration, PIO injections are not FDA-approved for use in pregnancy.  A recent meta-analysis showed that the intravaginal route with an appropriate dose and dosing frequency is equivalent to daily intramuscular injections.<ref name="Zarutskiea_2007">{{cite journal | vauthors = Zarutskiea PW, Phillips JA | title = Re-analysis of vaginal progesterone as luteal phase support (LPS) in assisted reproduction (ART) cycles | journal = Fertility and Sterility | volume = 88 | issue = supplement 1 | pages = S113 | date = 2007| doi = 10.1016/j.fertnstert.2007.07.365 | doi-access = free }}</ref> In addition, a recent case-matched study comparing vaginal progesterone with PIO injections showed that live birth rates were nearly identical with both methods.<ref>Khan N, Richter KS, Blake EJ, et al. Case-matched comparison of intramuscular versus vaginal progesterone for luteal phase support after in vitro fertilization and embryo transfer. Presented at: 55th Annual Meeting of the Pacific Coast Reproductive Society; 18–22 April 2007; Rancho Mirage, CA.</ref> A duration of progesterone administration of 11 days results in almost the same [[birth rate]]s as longer durations.<ref>{{cite journal | vauthors = Goudge CS, Nagel TC, Damario MA | title = Duration of progesterone-in-oil support after in vitro fertilization and embryo transfer: a randomized, controlled trial | journal = Fertility and Sterility | volume = 94 | issue = 3 | pages = 946–51 | date = August 2010 | pmid = 19523613 | doi = 10.1016/j.fertnstert.2009.05.003 | doi-access = free }}</ref>

Patients are also given estrogen medication in some cases after the embryo transfer. Pregnancy testing is done typically two weeks after egg retrieval.