The Islam Papers

The Visible Embryo is a visual guide through fetal development from fertilization through pregnancy to birth. As the most profound physiologic changes occur in the “first trimester” of pregnancy, these Carnegie stages are given prominence on the birth spiral. The shape and location of embryonic internal structures and how they…

The Multi-Dimensional Human Embryo is a collaboration funded by the National Institute of Child Health and Human Development (NICHD) to produce and make available over the internet a three-dimensional image reference of the human embryo based on magnetic resonance imaging. The collection of images is intended to serve students, researchers,…

Human prenatal development is divided into an embryonic period and a fetal period. The embryonic period begins with fertilization and ends eight weeks later. The staging of human embryos was introduced in 1914 by Franklin P. Mall at the Department of Embryology of the Carnegie Institution of Washington. Mall’s successor,…