Links to the headlines. Baby brain doesn't exist and the condition is all in mum's mind, say scientists. Daily Mirror, April 7 2015. 'Baby brain' DOESN'T exist: Tests reveal pregnant women and new mothers suffer no decline - leading scientists to declare the condition is 'all in the mind'.
Low Estrogen Premenstrual Symptoms. Low Estrogen Premenstrual Symptoms. While low progesterone is the most common hormone imbalance responsible for PMS and PMDD, and testosterone excess or deficiency may be involved in many cases, low estrogen function may also be contributory to premenstrual symptoms.
The exact cause of PMS is not known. Changes in brain hormone levels may play a role, but this has not been proven. Women with premenstrual syndrome may also respond differently to these hormones. PMS may be related to social, cultural, biological, and psychological factors. Up to 3 out of every 4 women experience PMS symptoms during their childbearing years. PMS occurs more often in women: