Follicles Day 3 on stims vs On day of Retrieval

How mamy follicles you had on your first ultrasound after starting <a href="https://glowing.com/glow-fertility-program">IVF</a> stims medications? And how many follicles you had on the final day of retrieval?

Is it usually the same number or can follicles start growing after day 3 as well?