Differences in fertility associated with caffeinated beverage consumption.
OBJECTIVE
The effect of caffeine consumption on fertility was examined prospectively in 210 women.


METHODS
Women reported on caffeinated beverage consumption and pregnancy status monthly. Odds ratios for becoming pregnant were calculated for both high and moderate vs low consumption.


RESULTS
No significant association was found for any of the caffeinated beverages except tea. Drinking one-half cup or more of tea daily approximately doubled the odds of conception per cycle.


CONCLUSIONS
These data suggest that caffeine may not be the responsible agent for variation in fertility associated with consumption of the beverages examined.
Caan
B
B
Division of Research, Kaiser Permanente Medical Care Program of Northern California, Oakland 94611, USA.
Quesenberry
C P
CP
Coates
A O
AO
D000328:Adult; D001628:Beverages; D002110:Caffeine / Q000494:pharmacology*; D002140:California; D005260:Female; D005298:Fertility / Q000187:drug effects*; D006801:Humans; D008019:Life Style; D012044:Regression Analysis
D002110:Caffeine