During relaxation of the heart (diastole) the left ventricle of the heart fills with blood returning from the lungs. The left ventricle then contracts and pumps blood into the arteries (systole). The blood pressure in the arteries during contraction of the ventricle (systolic pressure) is higher because blood is being actively ejected into the arteries. It is lower during relaxation of the ventricle (diastolic pressure) when no blood is being ejected into the arteries.
The Premarin family of drugs contains estrogenic compounds that are made from the urine of pregnant mares. Thatâs where the name is derived from: PRE gnant MA resâ ur IN e = Premarin. Any HRT with Prem in the brand name is likely to contain conjugated equine (o)estrogen (CEE).
The role hormones play. The menstrual cycle is controlled by the hormones oestrogen and progesterone. Oestrogen is produced by the ovaries and makes the lining of the uterus repair itself and grow again after menstruation. Progesterone is produced by the empty follicle in the ovary after the egg has been released. This hormone maintains the lining of the uterus during the second half of the menstrual cycle.