Is it true that is it safe to take duphaston during pregnancy based on the following text?

Dydrogesterone has been prescribed and used in over 10 million pregnancies worldwide. There have been no harmful effects exhibited due to the use of dydrogesterone while pregnant. Dydrogesterone is safe to use during pregnancy only when prescribed and indicated by a medical practitioner. Studies have not shown any incidence of decreased fertility due to dydrogesterone at therapeutic dose. The Ames test found no evidence of any potential mutagenic or toxicity properties.
yes