can you link me to the study?
been about 3 years since ive done anyreading around subjects.
i was always under the impression it upregulated progestrone thus making t19nor induced gyno worse
dont have the study on hand but the outcome was that nolva only upregulated progesterone receptors in A FEW of the subjects and ONLY for the first few weeks, but then actually DOWNREGULATED progesterone receptors in ALL subjects afterwards.
i guess the safest bet would be starting nolva about 4 weeks before adding a 19nor if youre one of the unlucky ones who get upregulation at first