Chamomile tea may not be safe during any stage of pregnancy, in the first or later. The American Pregnancy Association reports that Roman chamomile is considered "probably unsafe" for pregnant women who consume it, and that there is enough research to determine that German chamomile is safer. The association also urges pregnant women to talk to their doctors before taking any herb, either in tea or in supplement form.
Chamomile and pregnancy
Roman and German chamomile are the two most common varieties found in tea and other products, and the Medical Center of the University of Maryland recommends that pregnant women do not consume either, due to the possible risk of miscarriage. In addition to avoiding chamomile tea, MedlinePlus recommends that pregnant women do not use topical products, such as lotions or perfumes, that contain the flower of Roman chamomile. This may also not be suitable for consumption during lactation. Apart from the precautions that should be taken during pregnancy and lactation, chamomile is generally safe at normal doses for most adults.