At the 8th gestational week the thymus was not yet subdivided into lobules, nor recognized the cortex and medulla.
周胎胸腺尚未分小叶，也不能分辨皮质和髓质。
Several experiential formulae are used in the traditional method to estimate the gestational week and fetal weight. However, the results are dispersed.
传统的孕周和胎重估计方法利用经验公式进行，结果离散度较大。
The results show that the gastrin concentrations in amniotic fluid and serum decrease with the increase of gestational week and increase markedly after term pregnancy.
结果：随孕周的增加羊水和血清胃泌素浓度不断降低，足月后又明显升高。
ConclusionFetal DNA in maternal plasma can be detected in different gestational stages. The detection rates of fetal DNA in maternal plasma increase with the week of gestation.
结论在不同的妊娠阶段都可检测到孕妇血浆中的胎儿dna，胎儿dna检出率随孕周的增加增高。
Methods The women with 18-42 week gestational age were studied by using GE V730 three-dimensional color ultrasonography to observe fetal lips by 2D and 3D in & out patient in my hospital.
方法应用GEV730三维彩色超声诊断仪，对门诊及住院18-42周妊娠妇女的胎儿唇部进行二维及三维超声观察。
Methods the neural stem cells were isolated, identified and amplified from the cortex of aborted human embryo with 10 to 14-week gestational age, then telomerase activity was detected by PCR-ELISA.
方法分离、鉴定并扩增取自10 ~ 14周药物流产胎儿大脑皮质的神经干细胞，应用pcr - ELISA法检测神经干细胞端粒酶活性。
Their gestational period is about 6 weeks and in second week, the body weight is reduced, but from then on, the body weight gains day after day.
妊娠期为6周左右，其间在第二周体重稍有下降，其后体重呈直线上升状态；
Their gestational period is about 6 weeks and in second week, the body weight is reduced, but from then on, the body weight gains day after day.
妊娠期为6周左右，其间在第二周体重稍有下降，其后体重呈直线上升状态；
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