Is inserting a small amount of pure honey deep into the vagina daily, in addition to frequently seeking forgiveness (Istighfar) and reciting Surat Al-Fatiha 40 times daily between the Sunnah and obligatory prayers of Fajr, considered an effective treatment for infertility?

The treatment mentioned was not prescribed by Islamic law in this specific form. However, it is mentioned that seeking forgiveness (istighfar) brings sustenance and offspring, that honey is a cure, and that the Qur'an is a healing and a mercy. The specific form mentioned in the question is not explicitly stated [in religious texts], but there is no harm in trying it if it proves beneficial, with the caution of not believing that it is prescribed by Islamic law. One should increase seeking forgiveness and supplication (du'a) during times when prayers are answered, while observing the etiquette of supplication.