| The antigen is prepared from virus grown in the allantoic cavity of embryonated hen's eggs. |
| The allantoic cavity persists, but the allantois only covers the placental area of the chorion. |
| Each of the strains is separately inoculated into the allantoic cavity of chicken embryos with neomycin solution equivalent to 0.5 mg per egg. |
| Again, we performed the tests on embryos, plus allantoic fluid from the eggs after five days. |
| The allantoic arteries in the cord wind in a spiral manner round the allantoic vein. |
| The urachus is a remnant of allantoic origin, connecting the embryonal cloaca to the allantois during early intrauterine life. |
