Is it permissible for a woman to deliberately get her period in Ramadan?
Question

                I am a woman who suffers from a disease called early ovarian failure, which means that I do not get a monthly period except by means of medical treatment. Is it permissible to get my period in Ramadan? I can also choose not to get it because the choice of when to get the monthly period is under my control.
Praise be to Allah.
    Firstly: 

    If a woman needs to take medicine in order to get her period, 
    either because she does not get it at all except by means of medication, as 
    mentioned in the question, or because she does not have a regular period, as 
    is common among women, there is nothing wrong with that if the medicine is 
    permissible in and of itself and no harm will result from taking it. 

    If she gets a period after taking the medicine, then she 
    should stop praying and fasting for the length of her period, then she 
    should make up the fasts but not make up the prayer, as applies to all other 
    women with regard to their periods. 

    Al-Nawawi (may Allah have mercy on him) said:  

    If she takes medicine to menstruate and gets her menses, she 
    does not have to make up [the missed prayers]. Similarly, if she takes 
    medicine to abort a foetus and she aborts it and bleeds after that (i.e. 
    nifaas), she does not have to make up the prayers she missed during the 
    nifaas period, according to the correct opinion. End quote from 
    al-Majmoo‘, 3/10. 

    Secondly: 

    It is haraam for a woman to deliberately take this medicine 
    in Ramadan or close to it for the purpose of not fasting in Ramadan. 

    Al-Mardaawi (may Allah have mercy on him) said: 

    It is permissible to take medicine in order to get one’s 
    menses. This was stated by Shaykh Taqiy al-Deen [i.e., Ibn Taymiyah] and 
    this is the only view he mentioned in al-Furoo‘, unless that is done close 
    to Ramadan in order not to fast. This was stated by Abu Ya‘la al-Sagheer. 

    I [al-Mardaawi] say: and there is no one who disagrees with 
    him. 

    End quote from al-Insaaf, 1/273. See also al-Furoo‘, 
    1/393; al-Fataawa al-Kubra, 5/315 

    Shaykh Mansoor al-Bahooti (may Allah have mercy on him) 
    said: 

    It is permissible for a female to take permissible medicine 
    in order to get her menses, but not close to Ramadan in order not to fast. 
    (The same ruling applies to) travelling (close to Ramadan) in order not to 
    fast.

    End quote from Kashshaaf al-Qinaa‘, 1/218 

    And Allah knows best.