It is not uncommon to experience changes in menstrual bleeding patterns while taking Visanne. Some women may have longer periods, spotting, irregular bleeding, or even no bleeding at all. These are reported effects of the medication. It is known that taking Visanne for a longer period significantly increases the possibility of not having periods. In some cases, it may take about 2 months after stopping Visanne for the menstrual cycle to return to normal. Therefore, a slight delay in menstruation should not be cause for alarm. However, it is important to note that Visanne is not an effective method of contraception. If there has been unprotected sexual intercourse, it is advisable to take a pregnancy test to rule out this possibility.