Here's a breakdown:
* Gestation period: 93-105 days (about 3-3.5 months)
* Litter size: 1-4 cubs (usually 2-3)
* Nursing period: 18 months
The frequency of births can be influenced by factors like food availability, habitat quality, and stress levels. However, a yearly breeding cycle is generally the norm for Sumatran tigers in the wild.