Jean Astruc, noting that parents of both sexes seemed to influence the characteristics of their offspring, suggested that the animalcule came from the sperm and was then shaped as it passed into the egg.
Jean Astruc, facendo notar que os pais de ambos os sexos parecían influír nas características dos seus descendentes, suxerían que os animálculos procedían dos espermatozoides e tomaban forma despois cando entraban no ovo.