Figure 2From: Reproductive cessation and post-reproductive lifespan in Asian elephants and pre-industrial humansLength of inter-birth interval with female age in elephants and women. (a) Inter-birth intervals decreased with female age in Asian elephants (n = 1480), (b) but increased in women (n = 21,033) (Additional file 1: Tables S2 and S3). The figure also shows two year averages and standard errors of inter-birth intervals in raw data.Back to article page