Angelica sinensis can regulate menstruation. If women of childbearing age suffer from irregular menstruation due to blood deficiency, they can take the medicine to regulate menstruation during the preparation for pregnancy, but they should not take the medicine after they have already conceived, and the specific medication should be taken according to the doctor’s instructions. Angelica sinensis has the effect of tonifying yin and blood, regulating menstruation, activating blood circulation, relieving pain, and moistening the intestines and laxatives. It is sweet, pungent and warm in nature, and is attributed to the liver meridian, the heart meridian and the spleen meridian. Clinically, it is mainly used for the treatment of yellowish color, irregular menstruation, menorrhagia, dysmenorrhea, bruises, constipation, rheumatism paralysis and carbuncle (a kind of venomous sores, occurring on the surface of the body, limbs, internal organs of the acute suppurative disease) sores and ulcers caused by blood deficiency. It is not recommended for those who have feverish bleeding and those who are allergic to Angelica sinensis. Angelica should not be taken by those with dampness (too much dampness causing fullness and discomfort in the spleen and stomach), loose stools, or allergies. At present, there is no clear adverse drug reaction after taking Angelica sinensis. There is no clear regulation on how many days before pregnancy preparation one can take Angelica sinensis. In general, clinical experience suggests that women of childbearing age with blood deficiency can take Angelica sinensis for treatment, and the medication should be taken according to the doctor’s instructions.