I drank cebada, a toasted barley drink, and ecco, a toasted barley coffee substitute throughout pregnancy. They're popular drinks in both Peru and Japan. Never heard anything about them being unsafe for pregnancy. This Babycenter article lists toasted barley tea as one of the "safe" teas.
Where are you purchasing the Pero at? I can not find it stateside. I have my sister mail me some from Germany, It's called Caro over there, but it is the same exact thing. I would be interested in knowing where you get it here. Thanks
You can get Pero at Whole Foods and at Amazon. I drank that for a bit but fell in love with Teecchino - delicious and tastes more like coffee to me. Vanilla nut is delcious and Hazelnut is good but very strong in flavor.