Estrogen helps the tissues in your body to retain moisture. A drop in the estrogen levels during menopause could lead to dehydration. So it's important to drink sufficient water and other fluids to remain hydrated. If you have a body weight of 150 pounds, then your daily fluid intake should be 75 ounces per day. While water will make up 2/3rds of your fluid intake, the remaining will come from the tea, coffee, and juices you drink.