From the Argentina Truth Commission report:

Abductions in the presence of children
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When a family which was to be chupada (A slang term, literally meaning ‘sucked up’, ‘swallowed’.) had children, the following methods were employed:

1.  The children were left with neighbours to be looked after until a family relative arrived.2.  They were sent to children’s homes. These would hand them over to relatives or have them adopted.3.  The children might thems...