结论氟有潜在的致畸性和胚胎毒性，胚胎组织gsh活性和卵黄囊细胞膜脂流动性降低可能在氟致胚胎发育毒性中起重要作用。
Conclusions Fluoride could result in embryonic growth retardation and potential teratogenic toxicity. These effects might be due in part to decrease in GSH activity and membrane lipid fluidity.
鸡蛋黄中的卵磷脂、甘油三脂、胆固醇和卵黄素，对神经系统和身体发育有很大的作用。
The lecithin, triglycerides, and cholesterol of egg yolk, plays a significant role in physical development of the nervous system.
结论早孕期对于卵黄囊的超声检测有一定临床意义。
ConclusionThere is some clinical value to diagnose early pregnancy.
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