Not sure leh, cos my short protocol at kkivf also 2 scans only. First scan on D2 of menses and then the next scan already tell me to prepare to go o&g at night for the trigger jab.
Dr Tan ask me to try long protocol as my first fresh yielded only 5 follicles and all were immature so he wanted me to try long protocol so that's better control of the development of the follicles. He ask me if I am ok to jab myself, if I am ok just bite the bullet and do a long cycle. My first fresh also with kkivf but under Dr Sadhana.
For waiting time, if u are early shld be quite ok. The later u come, the longer u need to wait.
For my first fresh, if I remember correctly, I reach at 8 plus end up I leave at 1 plus leh.. Cos in case medicine not enough, need to go pharmacy again. And depending if u have those remainder medicine that u need the nurse to combine the medicine for the daily jab. Let's see if I will run into u tomorrow. Heheh