Is it permissible to take medication to induce menstruation during Ramadan, knowing that its absence is due to low hormone levels and the aim is to perform insemination?

It is permissible to use medication to induce menstruation for a legitimate purpose, such as treatment for pregnancy. If menstruation occurs due to this medication at its usual time, it is considered menses, and all rulings pertaining to menstruation, such as refraining from prayer and fasting, apply to it.