The life and eating habits of the father-to-be will have a direct impact on the future health of his child. Alcohol and tobacco are the number one killers of men’s health and the main cause of untreated and recurring male diseases. The sperm deformity rate increases significantly in men who smoke frequently, and the sperm activity is low; the toxic effect of alcohol on germ cells affects the intellectual development of the fetus and can easily lead to imbecile children, and the number of sperm decreases and the vitality decreases in long-term drinkers, and the incidence of impotence and infertility increases significantly. Sperm has a growth cycle of about three months, so men should prepare for pregnancy at least three months to six months in advance if they want to get pregnant successfully. Also, one should stay away from environments with constant high temperatures, do not choose too strenuous sports, ride bicycles less, take hot baths less often, do not take saunas, etc., and do not wear tight clothes and jeans. For chefs, metallurgical industry, construction sites, welders and other high-temperature workers, more attention should be paid to daily cooling, as well as for workers who are exposed to toxic substances such as renovators, gas station workers and workers who are often exposed to toxic substances containing benzene such as making shoes, it is recommended to stop working for six months before preparing for childbirth.