1. A GnRH agonist and exogenous hormone stimulation protocol has a higher live-birth rate than a natural endogenous hormone protocol for frozen-thawed blastocyst-stage embryo transfer cycles: an analysis of 1391 cycles 
Micah J. Hill, D.O., Kathleen A. Miller, B.S., John L. Frattarelli, M.D. 
Fertility and Sterility 
Volume 93, Issue 2, Pages (January 2010)
DOI: /j.fertnstert
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2. Figure 1
Comparison of live-birth rates between the synthetic and natural cryopreserved-thawed blastocyst-stage ET cycles. The top graph represents all patients who underwent an ET (excludes cycle cancellations). The bottom graph represents all cycle starts (including cycle cancellations). Group A (n = 1391) consists of all patients. Group B (n = 211) consists of patients having a single blastocyst-stage ET. Group C (n = 859) consists of patients having two blastocyst-stage embryos transferred. Group D (n = 191) consists of patients having either one or two blastocyst-stage ETs who have additional cryopreserved blastocyst-stage embryos available.
∗Statistically significant (P<.05).
Fertility and Sterility  , DOI: ( /j.fertnstert )
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