is widely consumed as it is present in coffee, tea, some soft drinks and chocolate. Some evidence suggests that the consumption of caffeine, with a possible dose-response effect, may prolong the time to pregnancy and affect the health of a developing foetus, although the mechanism for this is unclear. Caffeine may affect ovulation and corpus luteum functioning through alterations to hormone levels [1] and has been shown to be associated with elevated early follicular E2 levels in females [2]. Although some studies have found a positive relationship between caffeine consumption and time to conception [3-6], study results are inconsistent and should be interpreted with caution [7-8].