My cycle is 56-60 days. If under pressure (usually work), the cycle can be as long as 120 days.
But my western doctors and ec said it (56-60 days) is fine, just we have less chances than others to get pregnant. My ec also said most important of all is our body is health so that we can be ready for a healthy BB.
But as VnusTam said, it is good to seek medical advice if you want a BB.
Add oil~!