It is the condition of not getting pregnant after 1 year of unprotected and regular sexual intercourse. 15% of the couples in the world feel the need to apply for supportive fertility techniques.
The point not to be forgotten is that even when normal couples with no health problems have sexual intercourse every day, in a single menstrual period, the possibility of getting pregnant is only 25%. After one year the possibility of pregnancy rises up to 80%.
In the cases of rare menstrual periods, 3 or more miscarriages, past pelvic infection, small testicles of the male and the past age of the woman a consultancy to a doctor should be made without waiting for a year.
The reproductive potential of the women is at peak between the ages of 20 to 30; after years the potential decreases and after 35 a faster decrease can be observed. Extremely thin and fat people can also encounter difficulties for getting pregnant. Also, smoking and alcohol decreases the sperm count of the man and spoils the egg quality of the woman.