Yeah, everyone if different, they will tailor a programme to suit you. I myself took metformin for 3 weeks before af arrived (cause I was at risk of over-stimulating), then started stims on cd3, then ovitrelle from cd5, & I continued both of these until cd9, triggered on cd9, & egg collection was on cd11. EC was originally intended to be cd14, but I responded well to the meds & they took me in earlier so I didn't over-stimulate.