妊娠早期母体血清中α胎儿蛋白浓度早在妊娠7周就可高于非妊娠水平。妊娠第三期的水平最高(160—190毫微克/毫升间)。分娩时。胎儿的α胎儿蛋白较同期的母体α胎儿蛋白水平约高100—500倍,而母体内与胎儿之间的α胎儿蛋白浓度有一定相互关系。正常妊娠在第3周时约有50％的人母体循环α胎儿蛋白水平可高于非妊娠水平,先兆流 Alpha-fetoprotein concentrations in maternal serum in early pregnancy may be higher than non-pregnant levels as early as 7 weeks of gestation. The third trimester was the highest (160-190 ng / mL). When giving birth. Fetal alpha fetus protein than the same period of the parental alpha fetus protein level is about 100-500 times higher, while the fetus between the fetus and alpha fetus protein concentration has a certain correlation. Normal pregnancies Approximately 50% of maternal circulating alpha-fetoprotein levels at Week 3 may be higher than at nonpregnant levels, with threatened flow