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Preformationism was a theory of embryological development used in the late seventeenth through the late eighteenth centuries. This theory held that…
OvaSpermVictor Albrecht von Haller was an 18th century scientist who did extensive work in the life sciences, including anatomy and physiology, botany, and…
OvumOvaFetusSpermism was one of two models of preformationism, a theory of embryo generation prevalent in the late seventeenth through the end of the eighteenth…
SpermatozoaSpermOva