ACOG technical bulletin. Health maintenance for perimenopausal women. Number 210--August 1995. American College of Obstetricians and Gynecologists

Perimenopausal women are assuming increasing importance in the practice of obstetrics and gynecology. While continuing to have reproductive concerns, such as attaining or preventing pregnancy, these women are confronted with a decline in estrogen levels and the inherent protection estrogen provides against osteoporosis and cardiovascular disease. Preventive care, life style modification, and early diagnosis and intervention can play a valuable role in maintaining patients' overall health and quality of life.

Published by International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics, 1995. The guideline itself is at the source linked here.

pubmed.ncbi.nlm.nih.gov/8635640/