Hi studentvera, it is great to hear all these examples from people who've worked through IVF - I am impressed!
My office is about 2.5 hours from the hospital and I am in a management role so spend most of my time in meetings, which makes it harder to work round. When I did IVF I also was on a temporary contract and trying to get a permanent job so I didn't tell anyone at work. I took two weeks' leave towards the end of treatment, and because it ended up taking longer than I was told, I also had to take a day's sick leave at the end of my annual leave, for the embryo transfer, which was a bit difficult to explain.
I was really glad to have the time off as it was a particularly stressful time at work, and I was finding it difficult not being able to tell anyone. That said, I ended up having two interviews for another job while I was on leave, which first of all provided a good distraction, but the second interview was between collection and transfer and I was feeling pretty rough. I didn't get the job and found out the day before transfer and was upset about it, so not great timing. The IVF didn't work either, so all in all, not a great result (!), except I did end up getting a permanent job at the place I was already working, which means next time I could hopefully tell my boss.
This is all a long-winded way of saying that if you can work through IVF I think it's great - it can provide a good distraction, make the whole thing seem less of a big deal, and not use up valuable annual leave, meaning you can go on holiday later! But if you think it would be more stressful to be at work, don't feel like you should. IVF is a tough thing to go through so just do whatever you think is going to make it easier for you.