During the incubation period, the dog may not show any signs of illness and, in fact, may not show symptoms until the heartworms have reproduced and spread into other parts of the body.
The project's long incubation wasn't caused by overly stringent privacy controls, said Mark Walport, director of the Wellcome Trust.
But from this perfectly correct observation a conclusion which is by no means warranted was drawn, namely, that the chick as a whole really exists in the egg antecedently to incubation; and that what happens in the course of the latter process is no addition of new parts, " alias post alias natas," as Harvey puts it, but a simple expansion or unfolding of the organs which already exist, though they are too small and inconspicuous to be discovered.
The project 's long incubation was n't caused by overly stringent privacy controls, said Mark Walport, director of the Wellcome Trust.