Lifestyle factors that affect fertility
Obesity – if BMI > 35 time to conception increases by two fold.
Underweight – BMI < 19 time conception increases by four fold.
Smoking – relative risk of infertility increases by 60%.
Alcohol > 2 drinks / day relative risk increases by 60%.
Caffeine > 250 Mg / day decreases fecundity by 45%.
Illicit drugs – RR of infertility increased by 70%.
Toxins, solvents – RR of infertility increased 40%.
So lifestyle changes are must for increasing fertility.