近来处理精神发育不全有了一定程度的进展,但是更重要的问题在于预防.现在,已有充分证据指出胚胎期和胎儿期是脑的脆弱阶段,易受损伤.所以,预防这些损伤成为产科学任务之一.发育的最早期,如在受精、桑椹期、囊 There has been some progress recently in the management of mental retardation, but the more important issue is prevention, and now there is sufficient evidence that the embryonic and fetal stages are fragile stages of the brain that are vulnerable to injury. Therefore, prevention of these injuries becomes obstetrics One of the tasks. The earliest development, such as fertilization, mulberry period, sac