Table 1. Fertility awareness
  % n=669
Level of knowledge about human reproduction    
High 68.6% 459
Medium 29.6% 198
Low 1.8% 12
Source of knowledge    
Media 46.6% 312
School 24.2% 161
Family 11.1% 64
Friends 7.7% 51
Physician 5.9% 39
University 4.1% 27
Female fertility (cycle days)    
12-16 21.8% 146
Rest of days* 78.2% 523
Chances of pregnancy during ovulation    
0-20% 0.4% 3
20-40% 2.7% 18
40-60% 13.3% 89
60-80% 29.3% 196
80-100% 54.3% 363
Decrease in female fertility (years)**    
25-30 4.6% 31
35-40*** 26% 174
40-45 33.2% 33.2
45-50 36% 241
Decrease in male fertility (years)    
35-45 1.2% 8
45-55 6.4% 43
55-65 13.9% 93
65-75 20.9% 140
Never 57.5% 385
Couples with difficulties achieving pregnancy (%)    
0-20% 10% 67
20-40% 33.8% 226
40-60% 45.6% 305
60-80% 10% 67
80-100% 0.6% 4

Notes:
* possible answers were divided ‘1-4; 4-8; 8-12; 12-16; 16-20; 20-24; 24-28’ and were counted as ‘rest of days’.
** n=668 (Only one person answered 20-35, and this data point was eliminated from the total.)
*** no one selected the 30-35 category