[Circulation time and dynamics of 3H-thymidine incorporation into DNA at various stages of chick embryo development]

The most adequate method for carrying out radioautographic investigation on proliferation in the chorioallantoic tissues and in the chick embryo proper is dropping 3H-thymidine on the membrane under the shell in the area where the chorioallantois grows under. Using the application method, the radioautographic analysis of proliferation could be performed by the saturation method.