Maybe just ask if you could have the MG 'before' the biopsies? Sometimes the biopsies are done with ultrasound guidance too ..... tho as @Aska says, the MG will pick up any clips .....
From memory, mine were just straight biopsies, no clips. The biopsy 'gun' DOES tend to be quite loud tho, so be prepared for the 'bang' ... I wasn't expecting it and I almost launched myself with the 'start'! LOL
Yes, the biopsy areas can be a bit bruised & tender after the biopsy, but that usually 'comes out' some hours later - or the next day. I've always found my MGs to be quite uncomfortable & often painful .... not sure if is because I have dense breast tissue that doesn't like being squished??
take care & all the best