beware of synthetic hormones - they are more likely to create havoc in the body. progestin is SYNTHETIC remember that. most menopausal/postmenopausal women are already estrogen dominant - estriol is the good estrogen and also cancer protective that we tend to lose as we age. estrogen (E2) is the one more likely to become carcinogenic when out of control.
try to stay to natural treatments as possible - i'm currently taking natural hormones - no more night sweats and insomnia improved signficantly. google dr. john lee to find out more about hormone replacement for women. that's where ultimately found the information i needed to improve my own horrormones. hope this helps.
good luck and double goody for your mom still working out!