This species has only rarely been bred in captivity. This is simply because at this point of time there are very few specimens in collections and not because they are more difficult to breed than any other adder.
Mating in the wild occurs in the wild from about late December to the end of January. As with all adders they bear live young and this occurs in April to May.
As far as offspring numbers for this species goes, of a total of 6 known litters, that I am aware of in captivity, the litter number has averaged out to be 8 with the minimum being 5 and the maximum from a huge female with a total body length of 540mm, being only 11.
Based on this small sample size though, it would seem that they have smaller litter numbers than A. pyrrhus. If this assumption is true, it raises many questions i.e. in the wild do the young have the same mortality rate as other adder's species that have larger litters?
Hatchlings that I have personally weighed have ranged in weight between 2 and 4 grams with the average being 2.7 gms.