1.   But estrogen alone was found in the new study and others to be twice as effective in reducing the risk of a heart attack.

2.   For them, estrogen alone, with periodic tests to check on the uterine response, may be better.

3.   In terms of cholesterol, it is also clear that estrogen alone is better than estrogen plus progestin, she says.

4.   It had been established that estrogen alone, while highly effective against cardiovascular problems, causes an increase in uterine cancer.

5.   Women who have not had hysterectomies often take progestin with estrogen to avoid the increased risk of uterine cancer that estrogen alone poses.

6.   Estrogen alone is no longer prescribed to most postmenopausal women because it can promote uterine cancer.

7.   For this reason, the discovery that estrogen alone could trigger PMS in susceptible women was a surprise.