Pregnant and going for interview

Hello all! I’m new to this app. I’m also in a similar situation.. it’s just that I’m coming to 15 weeks into pregnancy. Recently I got shortlisted for a dream job that I hope to get.. but bcos of my pregnancy I’m worried about being disadvantaged too. There are supposedly 4 rounds of interviews - 1st is a video assessment, 2nd with recruiter, 3rd with hiring manager, 4th is a technical and panel interview. I got past the 1st round and not sure at which point/round now should I be sharing abt my pregnancy too :( Any advice on which point/round is the best time to share the news?