Ruling on Inducing Menstruation in Ramadan Due to Wedding After `Eid
Question

My wedding, In sha Allah, will be right after `Eid, and my menstrual cycle is expected in the last week of Ramadan or it might be delayed until the wedding date. Is it permissible to take medication to induce the menstrual cycle in Ramadan before the wedding?
Praise be to Allah.It is permissible for a woman to take medication to induce menstruation in Ramadan, so that her wedding after `Eid does not coincide with her period, provided that her intention is not to break the fast.
Al-Mardawi (may Allah have mercy on him) said: "It is permissible to take medication to induce menstruation, as mentioned by Shaykh Taqi Ad-Din [meaning Ibn Taymiyah], and he focused on this in Al-Furu`; except close to Ramadan in order to break the fast, as mentioned by Abu Ya'la As-Saghir.
I [Al-Mardawi] say: And there is no opposition to this." End quote from "Al-Insaf" (1/273).
See also: "Al-Furu`" (1/393), "Al-Fatawa Al-Kubra" (5/315).
And Al-Bahuti (may Allah have mercy on him) said: "(It is permissible) for a female (to take permissible medication) to induce menstruation, not close to Ramadan in order to break the fast; like traveling to break the fast." End quote from "Kashshaf Al-Qina`" (1/218).
Travel is only prohibited if it is intended as a means to evade the obligation and break the fast in Ramadan.
However, if there is a valid reason for travel, it does not prevent one from doing so, nor does it prevent taking concessions to break the fast in Ramadan or shorten the Salah (formal prayer).
So, if your intention is not to break the fast, but rather what you mentioned about fearing that the wedding may occur during menstruation, then there is no harm.
But if it is possible for you to take medication after `Eid to prevent menstruation, or to postpone the wedding date to two weeks after `Eid or so, this is preferable to taking medication now that induces menstruation and prevents you from fasting.
And Allah knows best.