Editor's note: Madeleine Howell-Moroney created the above image for this article. You can find the full image and all relevant information here.
Editor's note: Sarah Walls created the above image for this article. You can find the full image and all relevant information here.
The Public Broadcasting Station (PBS) documentary Life’s Greatest Miracle (abbreviated Miracle, available at http://www.pbs.org/wgbh/nova/miracle/program.html), is arguably one of the most vivid illustrations of the making of new human life. Presented as part of the PBS television series
Leonardo da Vinci’s embryological drawings of the fetus in the
Tooth enamel contains relics of its formation process, in the form of microstructures, which indicate the incremental way in which it forms during enamel formation on teeth
Historically the exact age of human embryo specimens has long perplexed embryologists. With the menstrual history of the mother often unknown or not exact, and the premenstrual and postmenstrual phases varying considerably among women, age sometimes came down to a best guess based on the weight and size of the embryo.