The way an embryo develops shows a method of patterning that makes use of physical processes as if they conform to a predetermined plan.
In “real time” they show the function of an enhancer in switching a gene from off to on.
Complexity (such as we see in a pile of autumn leaves) can arise spontaneously from unguided natural processes, but complex specified information cannot.
Scientists are delving into the remarkable way a zygote grows through its embryonic stages to an adult.
After going through the appearance of hand-wringing, I wouldn’t expect much of a problem if scientists said they really wanted to proceed.