Fig. 1. Receiver operating characteristics plot for the determination of
cut-off values for a semiquantitative pregnancy-associated glycoprotein
ELISA for the detection of embryonic/fetal mortality at o100 days of
pregnancy. (A) The cut-off value for diagnosis (target SEN490%, and
SPEZ50%); (B and C) cut-off values for prognosis that do not fulfill both
criteria (SPE490%, and SENZ50%); and (D) the best combination of SEN/
SPE for the prognosis of EM/FM is located at the beginning of the plateau
(no decrease in SEN but an increase in SPE). OD¼optical density.