Female Fertility and Menstrual Cycle Disorders
In Germany, chasteberry is used to treat luteal phase disorders. This is the second half of the menstrual cycle, which is usually shortened in women with the disorder .
Luteal phase disorder is primarily caused by progesterone deficiency in the first phase of the menstrual cycle. Another menstrual cycle disorder, called amenorrhea, is the absence of menstruation. This may be caused by sustained hormone fluctuations, thyroid malfunction, pituitary tumor, premature menopause, and pregnancy
A uterine fibroid is a non-cancerous tumor that develops in the uterus of many women. Most of the time, uterine fibroids are caused by hormonal imbalances (especially, high levels of progesterone). Because of this, hormone therapy is commonly used to treat and shrink uterine fibroids [22, 23].
Since chasteberry reduces progesterone levels, it may alleviate some symptoms of uterine fibroids