Is it obligatory to repeat the ablution if vaginal discharge increases after ablution or during prayer, knowing that vaginal discharge is pure but nullifies ablution, and it is not clear whether the new discharge is the same as what was present before ablution or if it exited afterwards?

Vaginal discharge is pure but nullifies ablution. A woman afflicted with incontinence of this discharge should perform ablution after the entry of the prayer time and pray with that ablution as much as she wishes until that time expires. However, if she finds a period during which the discharge does not occur, she should wait for that time to pray. If the discharge occurs during ablution or prayer, and the woman is not among those afflicted with incontinence, she must repeat her purification and prayer. Doubt about the discharge occurring is based on the default assumption of non-occurrence until certainty is achieved otherwise. If discharge is found after prayer, then if it is probable that it occurred after the prayer, her prayer is valid. But if it is not probable except during or before the prayer, she must repeat her purification and prayer.