fetal resorption胎儿吸收？

Nitrous oxide is a weak teratogen in rodents. Rats continually exposed to 50–70% nitrous oxide for 2–6 days (starting on day 8 of gestation) had an increased incidence of fetal morphological abnormalities [33]. When rats exposed to 70% nitrous oxide or to a similar concentration of xenon for 24 h on day 9 of gestation, fetal resorption, skeletal anomalies, and macroscopic lesions occurred only in the nitrous oxide group。

氧化亚氮在啮齿类动物中是一种弱致畸剂。大鼠连续暴露于50%～70%的氧化亚氮中2～6天（从妊娠第8天开始），其胎儿形态畸形的发生率增加[33]。当大鼠在妊娠第9天暴露于70%氧化亚氮或类似浓度的氙气24小时，只有氧化亚氮组出现胎儿吸收、骨骼畸形和肉眼可见的病变[34]。在大鼠实验中，氧化亚氮可导致胎儿生长迟缓以及形态学异常和身体偏侧化变异的发生率增加[35]。

fetal resorption胎儿吸收？啥意思？谢谢