Reference: Fataawa al-Lajnah ad-Daa.imah lil-Buhooth al-‘Ilmiyyah wal-Iftaa. – Fatwa No.9881
Fataawa Ramadhaan – Volume 2, Page 530, Fatwa No.499
Question: If a woman entered her finger into her vagina whilst washing herself [after urinating], or if she places some ointment or tablet [in her vagina] for treatment or if a female doctor places her hand or some medical instrument [into her vagina], do [any of] these obligate her to perform ghusl?
And if this occurs in a day in Ramadhaan, does it break her fast and is she required to make up her fast?
Response: If [any of] that which is mentioned occurs, then it is not obligatory to perform ghusl of janaabah (state of major ritual impurity) and nor is the fast spoiled (affected) as a result.
And with Allaah lies all success, and may Allaah send prayers and salutations upon our Prophet Muhammad ﷺ and his family and his companions.