This is a very individual thing.
There is no reason why you should stop yoga when you are menstruating unless you are in a lot of pain or very tired. In which case, be kind to your body and do what feels best for you at that moment.
Generally speaking, the advice is not to practice inversions, which can interrupt the downward flow. Strong twists can be uncomfortable as well.
Listen to what your body tells you! While lots of women practice as normal, for some women a slower, more restorative practice might be beneficial. Some women find yoga helps with period pains and cramps.
You can find specific classes for your whole cycle on the website – use the specific use filter:
women´s health.