What he is after midday and before afternoon, that is the pratihâra. On it all germs are dependent. Therefore these, having been conceived (pratihrita), do not fall, for they share the pratihâra of that Sâman.

In plain words: The sun in early afternoon is the response part of the chant. Unborn babies and seeds in the womb depend on it. That is why, once conceived, they hold on and do not fall away.