How does Jonas’ father describe the release?

From the text:

"No, I just have to make the selection. I weigh them, hand the larger one over to a Nurturer who's standing by, waiting, and then I get the smaller one all cleaned up and comfy. Then I perform a small Ceremony of Release and--" He glanced down, grinning at Gabriel. "Then I wave bye-bye," he said, in the special sweet voice he used when he spoke to the newchild. He waved his hand in the familiar gesture.