It is permissible for a person, if he is in a state of major impurity, to make Du`a to Allah and remember Him, including the Adhkar before sleeping and others. What is forbidden in a state of major impurity is Dhikr that consists of reciting the Quran, a full verse or more, whether that is read from the Mus-haf or recited by heart.

If a woman feels that some fluid has come out of her vagina, even if it is only a little, then she has to do ghusl, because of the report to that effect.

Ghusl is obligatory on men and women alike in case of ejaculation, even if the two circumcised parts do not meet, whether this happens as a result of manual stimulation or otherwise.

It is permissible for a person to take a shower naked because this was reported from the Prophet (peace and blessings of Allah be upon him).

You should not delay ghusl after having sexual intercourse with your wife in Ramadan so that you can pray Fajr with the congregation in the mosque.

It is permissible to delay ghusl until the time of Fajr but it is recommended for the husband and wife to do wudu before they sleep.