It's very smart to avoid caffeinated tea while pregnant. And yes, there many naturally caffeine free choices out there that are not made from the tea leaf. There are some really great herbal choices that come with a ton of flavor and will also provide nutritional benefit. You want to be sure to use loose leaf product and not pre-packaged teabags. This is the only way to ensure you are getting the most benefit both in flavor and nutrition. Some of the best include: Hibiscus, Jasmine, Ginger Root, and even Licorice Root. But if you are set on green tea you can significantly reduce the caffeine level by doing a 20-30 second steep that you will pour out. The 2nd steep will have a much reduced level of caffeine and you will still have a great tasting cup. But again you want to use loose leaf tea. If you use a prepackaged bag that 2nd steep is not going to taste like much of anything. Some good green teas to try would be a nice Dragon Well, Tai Ping, or Sencha.