At the 8th gestationalweek 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。
2
Several experiential formulae are used in the traditional method to estimate the gestationalweek 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。
3
The results show that the gastrin concentrations in amniotic fluid and serum decrease with the increase of gestationalweek and increase markedly after term pregnancy.