## Abstract Ultrasound scanning in early pregnancy sometimes reveals a 2β5βmm spheric structure lying adjacent to the fetus. The occurrence of this structure was studied in 60 consecutive ultrasound examinations. In the 7th to 9th weeks the sphere was seen in 19 of 22 examinations, and in the 10th
The occurrence of hippomanes within the yolk sac of lemurs
β Scribed by Hamlett, G. W. D.
- Publisher
- John Wiley and Sons
- Year
- 1935
- Tongue
- English
- Weight
- 632 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0003-276X
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract Using highβresolution realβtime ultrasound in the first trimester of pregnancy, we have been able to demonstrate, in addition to the fetus, the yolk sac and the amniotic membrane. Pitfalls to avoid in firstβtrimester pregnancies include (a) mistaking the yolk sac for a second separate f
The presence of sucrase in the yolk sac of the chick was studied biochemically and immunologically. The sucrase was partially purified from the yolk sac of hatched chicks and was compared with the sucrase purified from the small intestine. Immunodiffusion with antiserum against intestinal sucrase an