Schowing J, Sprumont P, Van Toledo B
C R Seances Soc Biol Fil. 1977;171(6):1163-6.
L.5-hydroxytryptophan (L.5-HTP) injections provoke, in the chick embryo, some malformations of the nervous system, when treated at 24 hours of incubation. The same treatement after 48 hours of incubation does not lead to malformations, but to a reduction in size which is as much obvious as the embryos are treated at a later stage. It seems that there could be some relation between the serotonin metabolism and the growth hormon secretion.
在鸡胚孵化24小时时注射L-5-羟色氨酸（L-5-HTP）会引发一些神经系统畸形。在孵化48小时后进行相同处理不会导致畸形，但会导致尺寸减小，且在胚胎发育后期接受处理时，这种减小同样明显。似乎血清素代谢与生长激素分泌之间可能存在某种关联。
