"[P]regnant women also must take care of their bodies, not avoiding exercise nor adopting a low diet; this it is easy for the lawgiver to secure by ordering them to make a journey daily for the due worship of the deities whose office is the control of childbirth. As regards the mind, however, on the contrary it suits them to pass the time more indolently than as regards their bodies; for children before birth are evidently affected by the mother just as growing plants are by the earth."