1. Premature luteinization during gonadotropin-releasing hormone antagonist cycles and its relationship with in vitro fertilization outcome 
Ernesto Bosch, M.D., Iván Valencia, M.D., Ernesto Escudero, M.D., Juana Crespo, M.D., Carlos Simón, M.D., José Remohí, M.D., Antonio Pellicer, M.D. 
Fertility and Sterility 
Volume 80, Issue 6, Pages (December 2003)
DOI: /j.fertnstert

2. FIGURE 1
Area under the receiver-operating characteristic (ROC) curve for serum hormone measurements. (A) Serum E2 level. The area under the ROC curve was (95% CI, to 0.660). (B) Serum LH level. The area under the ROC curve was (95% CI, to 0.709). (C) Serum P level. The area under the ROC curve was (95% CI, to 0.789). The difference between these areas and the reference line (area 0.5) was statistically significant only for serum P level (P=.008).
Bosch. Serum progesterone and IVF outcome. Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /j.fertnstert )