Question:
What do rabbanim say about taking birth control to push of a women’s period so she won’t be a nida by her wedding?
Answer:
Years ago it was very controversial among the rabbeim, not from a halachic standpoint, but from a practical one, because it used to cause staining, sometimes for a while afterwards. Nowadays the pills seem to be better in this regard, (not that they are perfect) and therefore most rabbonim are for a kallah taking a pill to push her period off. However it should only be done under the guidance of a doctor that is experienced in administering the medication.