ObjectiveTo evaluate the efficiency of heparin on the ratio of peak systolic to least diastolic flow velocity (S/D) of umbilical artery flow velocity waveforms at second-trimester pregnancies.

目的评价肝素对改善妊娠中晚期脐动脉收缩期最大血流速度（S）与舒张末期血流速度（D）的比值异常的临床效果。

youdao

The stillbirth group(delete those with placental abruption)was significantly higher in umbilical cord blood S/D value and lower blood pressure(P0.01).

死胎组（删除胎盘早剥者）脐动脉S/D值高于对照组，血压低于对照组（P值均〈0.01）。

youdao

There's a lot of interest in obtaining stem cells from the blood of the umbilical cord on birth.

从出生时的脐带血中取得一些干细胞,也很有趣

耶鲁公开课 - 生物医学工程探索课程节选

This is an umbilical cord he's talking about.

他把这种联系比作脐带。

耶鲁公开课 - 文学理论导论课程节选

Soon after birth, special cells were collected from their new son's umbilical cord and last month, transfused into his sister to help restore her damaged system.

ECONOMIST: Gene genies

ViaCell's umbilical cord product is entering human trials.

FORBES: Small Stem Cells Find Big Backers

Cells from the baby's bone marrow or umbilical cord are used to treat the older child.

BBC: Embryology Bill: The key points