What Factors Influence Fertility?

What Factors Influence Fertility? What factors influence fertility? Age. Previous Pregnancy. Duration of subfertility. Timing and Frequency of Sexual Intercourse. Lifestyle Factors. Weight. Smoking. Caffeine. What are the main factors which influence fertility? There are numerous factors that can affect an individual’s fertility such as age, weight, alcohol, drugs or smoking, diet, exercise, etc. Fertility