Thanks for you query.
I read your query and I understand your concerns.
Following is my reply:
1) The tablets you have mentioned will lead to menses by mechanism called progesterone
withdrawal which just mimics the natural way or getting cycles.
2) It is safe and as good as a natural cycle to begin you treatment. No need to worry
I hope I answered your query. I will be available for any follow up query you have.
All the best for your IVF this time
Dr. Mahesh Koregol
IVF & Infertility