If a person ejaculates in his sleep, does his fast become void?

Answer

If a person observing fast knows that if he sleeps during the day time he will become Mohtalim (i.e. semen will be discharged from his body during sleep) it is permissible for him to sleep, even if he may not be inconvenienced by not sleeping. And if he becomes Mohtalim, his fast does not become void.