Red clover -- also called cow or meadow clover -- is a wild herb that's part of the legume plant family. Traditionally, this supplement has been used to treat respiratory problems but may also help in the treatment or prevention of osteoporosis, menopausal symptoms and high cholesterol, according to health professionals with the National Center for Complementary and Alternative Medicine. Despite these benefits, pregnant women shouldn't take supplements that contain red clover.
Red Clover Effects
Red clover contains phytoestrogens called isoflavones, which mimic the way estrogen -- a female sex hormone -- acts in a woman's body. Estrogen is involved in regulating a number of different reproductive processes in women, including ovulation, menstruation and pregnancy. This sex hormone also has a role in labor induction and breast milk production. Consequently, red clover treatment during pregnancy may result in complications.
Side Effects
Treatment with red clover supplements may induce general side effects if used properly by women who aren't pregnant. The most common side effects include nausea, skin rash and headache. Additionally, prolonged or excessive use of red clover may actually reduce your chances of becoming pregnant. The University of Maryland Medical Center, or UMMC, says animals such as cattle that consume large amounts of red clover can't produce offspring. However, more research in human subjects is necessary to determine the exact effect red clover may have on female fertility.
Potential Pregnancy Risks
As of 2010, research examining the safety of red clover during pregnancy was lacking. The potential pregnancy risks associated with red clover treatment are theoretical and are based upon the known action of estrogen in the female body. Treatment with red clover during pregnancy may stimulate uterine contractions, which may cause miscarriage, stillbirth or preterm labor. This natural supplement may also affect the way a fetus develops while in utero. Fetal exposure to estrogen-like compounds may affect the normal reproductive organ development. Breastfeeding mothers may also have lactation difficulties, such as poor milk production, if they take red clover supplements. If you have questions or concerns about the use of red clover during pregnancy, consult a medical professional for further guidance and care.
Medication Interactions
Treatment with red clover supplement may interact with certain medications -- especially those that contain estrogen, such as birth control pills, the UMMC warns. Concomitant use of estrogen-containing birth control pills or hormone replacement therapy may enhance the effects of estrogen on a woman's body. Elevated estrogen levels may also induce more severe hormonal side effects, such as breast pain, menstruation abnormalities or mood changes. Red clover may also enhance the effects of blood thinners, which may lead to excessive bleeding or bruising complications. Before using red clover supplements, talk with your doctor about any medications you're taking.
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