I noogle every day. I found I have the best results doing it that way.
Some people say they get better results when they take breaks (once or twice a week, maybe even three times), so you can see what works better for you. But I don't see any reason to stop pumping just because you're on your period.
If you're worried about stretch marks just make sure you use a lot of lubrication and don't pump too hard (it should never be painful). You could also cut it down to 1 hour, a lot of people find that to be the optimal time.
Some people say they get better results when they take breaks (once or twice a week, maybe even three times), so you can see what works better for you. But I don't see any reason to stop pumping just because you're on your period.
If you're worried about stretch marks just make sure you use a lot of lubrication and don't pump too hard (it should never be painful). You could also cut it down to 1 hour, a lot of people find that to be the optimal time.