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The Effects of Caffeine on Fertility
from www. fertilinet.com
Reproductive studies have found a link between high levels of caffeine consumption by women and delayed conception. In a study by Hatch, women who consumed more than 300 mg of caffeine per day were twice as likely to have conception delayed for one year or more.
Hatch EE, Bracken MB (1993). Association of delayed conception with caffeine consumption. American Journal of Epidemiology, 138(12), 1082-092
Another study also linked high caffeine intake to delayed conception, but only in women consuming 500 mg or more (about four cups of coffee) per day.
Bolumar F, Olsen J, Rebagliato M, Bisanti L, and the European Study Group on Infertility and Subfecundity (1997). Caffeine intake and delayed conception: a European multicenter study on infertility and subfecundity. American Journal of Epidemiology, 145(4), 324-334.
| Item | Milligrams of Caffeine |
|
| Average | Range | |
| Brewed, drip method | 184 | 96-288 |
| Brewed, percolator | 128 | 64-272 |
| Instant | 104 | 48-192 |
| TEA (8-oz. cup) | ||
| Brewed, major U.S. brands | 64 | 33-144 |
| Brewed, imported brands | 96 | 40-176 |
| Instant | 48 | 40-80 |
| Iced (12-oz. Glass) | 70 | 67-76 |
| Caffeinated soft drinks (12 oz.) | 36 | 30-60 |
| Hot cocoa (12 oz.) | 6.4 | 3.2-32 |
| Chocolate milk beverage (8 oz.) | 5 | 2-7 |
| Milk chocolate (1 oz.) | 6 | 1-15 |
| Dark chocolate, semi-sweet (1 oz.) | 20 | 5-35 |
| Baker's chocolate (1 oz.) | 26 | 26 |
| Chocolate-flavored syrup (1 oz.) | 4 | 4 |
| Source: U.S. FDA and National Soft Drink association | ||
