A Chiari malformation (CM) is an abnormality in the lower part of the brain called the cerebellum. In normal anatomy, the cerebellar tonsils are located in the skull above the foramen magnum. Normally only the spinal cord passes through the foramen, however in Chiari the tonsils extend below the foramen.
Effects of Progesterone on the Uterine Lining. Progesterone plays an important part in the menstrual cycle. The menstrual cycle follows a precise pattern governed by the release of different hormones that interact with one another. Progesterone, whose production increases in the second half of the menstrual cycle, plays a pivotal part in preparing the uterine lining for implantation of an embryo. The corpus luteum, the remains of the ovulating follicle, produces progesterone after ovulation.
The gonadotrophin releasing hormone, also affects the functioning of the hypothalamus which in turn affects the pituitary gland, which then affects the ovaries, fallopian tubes and uterus. The imbalance of estrogen hormones can also cause menopause and all the symptoms associated with it. These hormones are influenced by certain factors such as nutrition, diet, lifestyle, exercise, stress, emotions, age and ovulation.