[Risk factors for the development of infertility in men].

The age and health condition at the time birth were evaluated in fathers of males suffering of sterility. Of 500 of them 4% presented no complaints while the rest suffered different diseases. Of 160 fathers of the second group referred for sterile marriage with normozoospermia 90% were healthy while the remaining showed diseases of circulatory and nervous systems. Of 40 patients whose fathers were 18-25 years during birth of their sterile sons, azoospermia was revealed in 12.5%, oligozoospermia of grade III--in 42.4% and correspondingly 25-40 years--in 5.1% and 12%; 40-50 years--in 13.1% and 45.3%; over 50 years--in 27.9% and 64.5%. Consequently, the age and health conditions of the fathers during their birth may be risk factors of sterility of their sons.