Converse Progessions and the New Moon Before Birth
"Each human embryo as it develops within the womb is said to recapitulate very briefly the series of biological evolutionary developments of life forms in the "biosphere" — i.e., within the very narrow space extending above and below the planet's surface. Once the embryo has become truly "human," it can be assumed that in a less obvious and perhaps unrecognizable manner it passes through the stages which led human races to the level of a biological development characterizing present day humanity.
A human embryo is not "viable" until it reaches about the beginning of the seventh month of gestation. Then the embryo is completely "human," and there are many cases of premature births at such a time. If the prematurely born baby survives, it is thanks to extreme and in a sense artificial care — that is, he survives because human beings have developed collectively a culture and especially a science which enables them to complete what "life" (in the biological and planetary sense) has left incomplete and condemned to extinction."