With any condition like this we highly recommend working with your care provider to make sure supplementing is appropriate for your specific health situation. We have had customers tell us over the years that they have been able to use Red Raspberry Leaf in conjunction with other elements of a health supporting plan when managing the symptoms of menorrhagia. To our knowledge it is usually not sufficient to fully manage the symptoms by itself but is very useful as a supporting member of a broad spectrum plan.
Some other supplements that have been helpful and useful for individuals and their care providers to use that might be helpful for you to research and ask your care provider about are liquid Chlorophyll, Spirulina and Floradix. They don't necessarily address the root cause of the issue but go a long ways in helping to manage the long term depletions and accompanying symptoms that go along with it.
Best wishes to you as you research, hoping for complete healing and recovery for you soon!
They have been used together in many situations with good success but it should be on a case by case as needed basis, supervised with a care provider familiar with both herbs and the individual health situation they are being used to address.
Some care providers suggest it from the very beginning, others in the second trimester and still others in the third. It is important to do your own research and work with your specific care providers recommendations. We have this article that might be of some help as you research: https://articles.beeyoutiful.com/2015/03/19/red-raspberry-leaf-a-miracle-herb-for-women/
We have had customers use (with their care providers recommendations) 2 to 4 capsules per day.
Hope this helps! Best wishes to you.