Child sacrifice in bloodlines is traditionally the first born but substitution is acceptable and in practice appears to happen quite frequently
The burial ground at Carthage, Tophet, was excavated not long ago, and it appears the practice of infant sacrifice was more common that previously thought. The Tophet cemetery was reserved exclusively to dispose of sacrificial remnants, andit was yuge.
Ancient Carthaginians really did sacrifice their children
After decades of scholarship denying that the Carthaginians sacrificed their children, new research has found 'overwhelming' evidence that this ancient civilization really did carry out the practice.
https://www.ox.ac.uk/news/2014-01-23-ancient-carthaginians-really-did-sacrifice-their-children
https://www.mdch.state.mi.us/osr/abortion/Tab_US.asp