We know much about the mechanisms involved in the development of embryos. But given the genome of the egg we cannot predict the way the embryo will develop. This will require a enormous computation in which all the many thousands of components , particularly proteins, are involved and so the behavior of every cell will be known. We would, given a fertilized human egg be able to have a picture of all the details of the newborn baby, including any abnormalities. We would also be able to programme the egg to develop into any shape we desire. The time will come when this is possible.
To arrive at the edge of the world's knowledge, seek out the most complex and sophisticated minds,
put them in a room together, and have them ask each other the questions they are asking themselves.