It also presents evidence that women who have normal progesterone levels when undergoing breast cancer surgery have better survival rates than those who undergo the same surgery with low progesterone levels. (johnleemd.com)
During Pregnancy: Too low progesterone levels may lead to miscarriage in pregnancy. (doctor-info.website)
I would recommend saliva hormone testing for you, as very long cycles like yours may indicate low progesterone levels. (maryvancenc.com)