Ftale, 1000mg is the perfect dose. Just once a day and only between cd1 and ov day, then stop.
I personally was worried about the mood effects of stopping suddenly so I had one 2 days after ov and 2 days after that and then stopped, (so 48 hours between doses), so kind of weaned off rather than the sudden stop. That was this last cycle when I got my BFP.
I'd done a sudden stop once before and the mood effects were horrific, although to be fair I'd been on it for a solid 12 months at the time and just ran out.
In may this year I had a sudden totally unexpected BFP but it ended almost before it began. I didn't know about not taking EPO after ov and so took it throughout, only stopping a week after getting my BFP (I'd already been spotting for a week at that point). Apparently it can cause mc as it can stimulate contractions! Whether that was the reason my bean didn't stick or if it was one of a host of other things I don't know. But I didn't take it again until my August cycle started, and then took it just the 2 weeks between af and ov. No bad effects when I stopped it that time.