When can we have sex after a miscarriage

You will have to wait for two weeks to have sex irrespective it was a normal miscarriage or D&C.

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Your bleeding must stop before you go for sex. However other ways of sex not involving vaginal penetration can be shared gently. The key thing is that your bleeding has been stopped before having sex. Bleeding normally stops within 7-10 days and waiting for two weeks, you can go for sex. If during sex, you feel again bleeding or cramping, stop it and wait for one week more. Waiting more for one week you can have sex and if still you face bleeding or cramp