Even bbt charting can help
Hi there. Having a long cycle makes it harder. She will have to track it and if it is long but regular, then she can get an idea of when she ovulates as it is generally about two weeks before your period when you ovulate. And sperm lives for about a week. If she is not regular, there is no way to know when she ovulates. Truth be told, predicting ovulation is challenging. You can try ovulation kits to help predict. But it would be expensive to use them during a really long cycle. Remember that it takes a year for the average couple trying to conceive. good luck