Parameter α-tocoferol, μmol/L P- value Retinol, μmol/L P- value
  <12 μmol/L (n=36) (1) 12-42 μmol/L (n=17) (2)   <1.05 μmol/L (n=35) (3) 1.05-2.8 μmol/L (n=18) (4)  
Menstrual cycle disorders 63.9%(23) 35.3%(6) 0.045* 48.6%(17) 66.7%(12) 0.254
Amenorrhea 19.4%(7) 5.9%(1) 0.412 11.4%(4) 22.2%(4) 0.421
Oligomenorrhea 36.1%(13) 29.4%(5) 0.760 34.3%(12) 33.3%(6) 1.000
Opsomenorrhea 19.4%(7) 23.5%(4) 0.730 14.3%(5) 33.3%(6) 0.154
The presence of total infertility 36.1%(14) 11.8%(2) 0.048* 28.6%(10) 27.8%(5) 1.000
Primary 22.2%(8) (0) 0.044* 17.1%(6) 5.6%(1) 0.401
Secondary 17.1%(6) 11.8%(2) 1.000 11.4%(4) 22.2%(4) 0.421
Structure of the causes of infertility
Tubal-peritoneal Factor 2.8%(1) (0) 1.000 25.7%(9) 22.2%(4) 1.000
Endocrine infertility 30.6%(11) 11.8%(2) 0.163 25.7%(9) 22.2%(4) 1.000
Uterine factor 13.9%(5) (0) 0.159 11.4%(4) 5.6%(1) 0.651
Luteal phase deficiency 61.1%(22) 47.1%(8) 0.001* 54.3%(19) 61.1%(11) 0.772
Decreased ovarial reserve 11.1%(4) 11.8%(2) 1.000 11.4%(4) 11.1%(2) 1.000
Table 3: Characteristics of Menstrual and Reproductive Function in Four Groups. *significant differences.