Intercourse during menstruation is prohibited. The Qur’anic wording is: فَاعْتَزِلُوا النِّسَاءَ فِي الْمَحِيضِ
Meaning: Keep away from women during menstruation, understood here as refraining from intercourse.
Other forms of permissible marital affection are not simply identical to intercourse in the legal ruling.