Tag Archives: Carnegie stages

Nonprofit Works to Fill the Knowledge Gap on Human Embryology

Caroline Funk  

Human embryologists’ best-kept secret could arguably be the Carnegie Stages of Human Embryonic Development. This system was established in 1942 and classifies the first eight weeks of every human being’s life into 23 stages based on objective developmental mile markers, beginning at the first contact of egg and sperm and continuing on into the fetal […]