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Women who consumed more than 300 mg of caffeine per day (more than 1 cup of coffee) had similar fertility rates compared to women who drank less than 100 mg to none per day. Women who drank two or more servings of tea per day were slightly more likely to conceive than those who drank no tea.

Since coffee is often lumped into the category of other bad habits like cigarette smoking and recreational drug use, it鈥檚 often recommended that men simply abstain from caffeine intake when trying to conceive. However, data suggests that this sort of recommendation is not as clear-cut as many would believe.

Caffeine disturbs the uterine lining which prevents the implantation of a fertilized egg, therefore resulting in miscarriage [21] Consuming more than 200 mg of caffeine per day (2 cups coffee) increases the risk of miscarriage by 31% [22]

Caffeine affects female reproductive hormones which inhibits ovulation, causes irregular menstrual cycles, and leads to infertility [10] Consuming 200 mg or more of caffeine per day (2-3 cups of coffee) reduces oestradiol concentrations.