✦ LIBER ✦
The assessment of prenatal age from the crown-rump length determined ultrasonically
✍ Scribed by Drumm, J. E. ;O'Rahilly, R.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1977
- Tongue
- English
- Weight
- 213 KB
- Volume
- 148
- Category
- Article
- ISSN
- 0002-9106
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Crown‐rump lengths determined ultrasonically in vivo and in utero in cases of known postovulatory age (33–86 days) agree well with those in length/age tables in current embryological usage. Within the embryonic period proper, however, for a given age, the ultrasonic lengths are usually 1 to 5 mm longer than those of fixed specimens. The probable reasons for this are discussed.