Vitex (Chaste Tree Berry), Fertility Herb
by Hethir Rodriguez, MH, CMT
Main Uses

Balances hormones in favor to progesterone
Aids with heavy bleeding during period
Too short a cycle
Uterine fibroids
Vitex is a very intelligent plant. This herb balances hormones and lengthens cycle without actually containing hormones or phytoestrogens. Vitex’s main action is on the hypothalamus and pituitary.
The German Commission E recommends Vitex for irregularities of the menstrual cycle, premenstrual complaints and mastodynia.
How much to take
Vitex can be taken in a capsule or tincture. I recommend a standardized capsule. Vitex may take some time to work its magic, take for at least 2 weeks to see a difference.
There is a possibility for interactions with oral contraceptives, hormone replacement therapy or other sex hormones.
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Studies on Vitex Agnus Castus
Here are some vitex studies relating to the use of the Chasteberry:
Vitex and Fertility. In this study, a Chasteberry preparation was used in a study of 3,162 women to assess the effectiveness of vitex for corpus luteum insufficiency. 77.4% had menstrual cycle disturbances of various types and the others suffered from a range of gynecological problems which included symptoms of corpus luteum insufficiency. The average length of treatment was 5 months. Hormone cytology and symptoms were used to assess the treatment.
The women reported the treatment as completely effective (33%), significant improvement (55%), and no change (7%). Their doctors reported very good results in 68% of cases, adequate in 22%, and no change in 7%. (1)
In another study, 20 women with secondary amenorrhea took a Chasteberry extract for 6 months. Lab testing was done to measure progesterone, FSH, and LH, and pap smears were done at the beginning of the study, at 3 months, and at 6 months. At the end of the study, the researchers were able to evaluate 15 of the women. Ten out of the 15 women had a return of their menstrual cycles. Testing showed that values for progesterone and LH increased, and FSH values either did not change or decreased slightly.(2)
In a third study, 18 women with abnormally low progesterone levels were given vitex daily. After 3 months of treatment, 13 showed increases in progesterone and 2 became pregnant.(3)
Vitex and hyperprolactinemia. In this study, 52 women with luteal phase defects due to latent hyperprolactinemia (high prolactin levels) were given either vitex or a placebo. Prolactin levels were normalized after 3 months in the treatment group and deficits in luteal progesterone production were eliminated. Two of the women became pregnant.(4)
In another study, 13 women with high prolactin levels and irregular cycles were given a vitex compound. Their prolactin levels fell, and normal menstrual cycles returned to all of the women.(5)
Vitex and acne. In this study, a Chasteberry preparation was used in women with menstrual cycle abnormalities. Acne was either eliminated or improved during treatment.(6)
In another study, 117 women with four different types of acne were treated with a Chasteberry preparation for 1-2 years. Improvement was seen after 6 weeks and by 3 months, about 70% were free of acne. Some treatment relapses were observed after 3-6 weeks.(7)