Caffeine and miscarriage?

Here's yet another study possibly linking caffeine to miscarriages. I wish they'd do one controlling for whether you drank organic coffee in unbleached filters. Non organic coffee has tons of pesticides and the filters--esp. with the hot water flowing through it--gives you your daily dose of dioxins. Sigh! Not to mention that there are studies showing that tea drinkers seem to actually increase their fertility and may help counteract the cancer causing effects of fertility drugs such as Clomid. Very confusing. This is hot off the press:

Newer, Stronger Evidence Caffeine Increases Miscarriage Risk
High doses of daily caffeine during pregnancy – whether from coffee, tea, caffeinated soda or hot chocolate -- cause an increased risk of miscarriage, according a new study by the Kaiser Permanente Division of Research. The study controlled, for the first time, pregnancy-related symptoms of nausea, vomiting and caffeine aversion that tended to interfere with the determination of caffeine’s true effect on miscarriage risk. (Embargo expired on 21-Jan-2008 at 00:05 ET)
Am. J. of Obstetrics and Gynecology