A sketch artist for a children's book

Evolution of a baby

As instructed by the contest creator , this sketch includes three stages of baby development and done with minimal effort . This is a simple sketch done on a paper with a pencil and a macron . The stages are shown connected with a single thread as it is one process and at the end of it baby is out of the stomach . I have tried to add some nuances like the zygote is shown in a womb(uterus) around it while the fetus is shown in the mothers stomach . I am open for inputs and corrections for this .