早在妊娠 23-25 天就有可能看到胎囊 (Royal et al 1979)。 在 6 週結束時,可能會有胎兒骨骼的證據,到 45 天時可以辨認出頭骨。 在 7 週結束時,通常可以識別整個胎兒骨骼。 It is possible to see fetal sacs as early as 23- 25 days ofgestation (Royal et al 1979). At the end of 6 weeks there may be evidence of fetal skeletons, with the skulls identifiable by 45 days. At the end of 7 weeks it is normally possible to identify the whole fetal skeleton. Veterinary Reproduction and Obstetrics 9th P113
早在妊娠 23-25 天就有可能看到胎囊 (Royal et al 1979)。 在 6 週結束時,可能會有胎兒骨骼的證據,到 45 天時可以辨認出頭骨。 在 7 週結束時,通常可以識別整個胎兒骨骼。 It is possible to see fetal sacs as early as 23- 25 days ofgestation (Royal et al 1979). At the end of 6 weeks there may be evidence of fetal skeletons, with the skulls identifiable by 45 days. At the end of 7 weeks it is normally possible to identify the whole fetal skeleton. Veterinary Reproduction and Obstetrics 9th P113