21.   To test the possibility, he put the young man on a regimen for six months that raised his estrogen level tenfold.

22.   Vaginal dryness may result when estrogen levels drop following delivery.

23.   Women are at a higher risk during ovulation, when estrogen levels are high, causing weakening in the joints.

24.   Writing in the American Heart Association journal Circulation, the authors speculate that the problem may lie with decreased estrogen levels.

25.   PMS symptoms go away during parts of the menstrual cycle when estrogen levels are high and progesterone is low.

26.   And exercise can reduce estrogen levels, which could help breast cancer patients because estrogen is considered to promote tumor growth, he said.

27.   And women often are helped by adjusting birth control or hormone therapy to stabilize estrogen levels.

28.   Arimidex and similar drugs drastically cut circulating estrogen levels, and their major known side effect is an increased risk of fractures.

29.   But it has been only in the past five years that researchers have found a link between estrogen levels and fat in the diet.

30.   In women, this may lead to an increase in estrogen production and increased estrogen levels have been linked to breast cancer.