Menstrual Cycles with NuvaRing
Question
Answer
Hello,
A. There is no need to observe the monthly cycle and interval. The average cycle should be observed until it is established three times that it does not occur due to the ring.
B. For the average cycle caused by the pills, one should be concerned according to the law. For the monthly cycle and interval, one should be concerned only as a stringency. There is no need to be concerned for the OZ cycle.
C. If you have already been using the ring for some time and know how long it takes for menstruation to occur after removing the ring, you should be concerned only a few hours before the expected time of occurrence. If you do not yet know how long, you should be concerned for two days after removal, as this is the usual time for most women. The prohibition before menstruation is only regarding intercourse and not other forms of contact.
D. The menstrual cycle that was before using the ring is not uprooted, as the body was forced not to have it in its fixed cycle. There is no difference in the length of time the ring is used.
Source
According to the instructions of the Gaon, Rabbi Avraham Fried, shlita