How many offspring does a llama have?

Both llamas and alpacas only have one baby, also called a cria. They are like horses in which that 99.9% of the time they only have one baby, but in rare cases, like horses, they may have twins, but often one or both of the twins dies and possibly the mother. But I have seen here on the internet one set of twins where the mother and the babies all lived and the babies are growing up just fine.