What is incumbent upon one from whom semen was emitted just before the dawn adhan in Ramadan, and he is unsure whether anything was emitted after the adhan?

The emission of semen due to a wet dream during the daytime in Ramadan does not affect the validity of the fast, as it is beyond one's control. However, its emission due to intercourse, foreplay, or masturbation after dawn breaks invalidates the fast. This is unless one stops intercourse or foreplay before dawn and semen is emitted afterwards, in which case the fast is not invalidated. If the emission of semen after dawn is not confirmed, then doubt is not to be considered, as the default is the validity of the fast.