Is it obligatory to check for discharge after ablution and before prayer, or after arriving at the mosque for Friday prayer, in order to repeat ablution if found, or is it permissible to complete the prayer with the same ablution despite expecting discharge to exit?

Discharges emitted from a woman invalidate ablution (Wudu') but do not necessitate a full ritual bath (Ghusl). It is obligatory to wash whatever part of the garment they have stained and to perform Wudu'. If these discharges are continuous and do not stop, she should perform Wudu' for each prayer after its time has begun and pray immediately. Her Wudu' will not be invalidated by their emission. If they are intermittent, she should delay the prayer until the time of their cessation. However, if she fears that the prayer time will expire, she should pray, and whatever is emitted from her will not harm her prayer.