Is it okay to take vitex/chaste tree berry while pregnant?

Prob not: Here is the best information than I could find on the internet: Some herbalists recommend using it during early pregnancy to keep progesterone levels high, though there is no research on this (just lots of historical use) and with any herb, I would recommend talking to a doctor or health care provider before taking any herb, especially during pregnancy In short, no research done, take at own risk