How Much Is Safe

• While trying to conceive or when pregnant, women should limit their caffeine intake to less than 100 mg. Anything more than that increases the possibility of complications.
  
  

Caffeine Levels

• According to the Starbucks website, a Tall Tazo® Chai Tea Latte has 75 mg of caffeine, and a Venti® has 120 mg either iced or hot. Oregon Chai Latte concentrate has 30 to 35 mg of caffeine per 1/2-cup serving, according to its website.
  
  

Risk of Miscarriage

• Women who consume caffeine during pregnancy, including tea, may double their risk of miscarriage.
  
  

Low Birth Weight

• Caffeine can also cause low birth weight. If a woman consumes more than 100 mg daily, chance of a low baby birth weight increases by 20%, according to a 2008 study in the United States published on the Health News website.
  
  

Other Complications

• Additional studies in Denmark have found that caffeine consumption may cause stillbirth. Others have shown that babies may be born with faster respiratory and heart rates because their mothers consumed caffeine during pregnancy.