Table 2. Distribution of the second ovulation according to patients’ P4 levels (normal and 5.65 -9.9 ngml) from the LabRep HC - UFG / Mater Clinic. Goiania, 2000-2014.
LUF (P4)   Ovulation
(US)
Anovulation
(US)
Total X2 P
Group I (LUF) 50 (20.4%) 24 (42.1%) 74 11.76 0.001
Group II (No LUF) 195 (79.6%) 33 (57.9%) 228    
Total 245 57 302    
P4 (progesterone); X2 (chi-square value). Group I - LUF (P4 5.65 - 9.9 ng/ml); Group II - No LUF (P4 ≥ 10 ng/ml). IC 95% (0.191 - 0.649). OR (odds ratio) = 0.353