Watch Free Online HD Moviesjoy. In this BBC documentary directed by Andrew Neal and narrated by David Attenborough, modern medical imaging allows scientists and doctors to observe human development in the womb as never before. Following the stages of pregnancy from conception to birth, the film reveals the complex biological processes that shape the earliest months of human life. (Note: Standalone BBC2 documentary (1981) broadcast within the "General Studies" strand but produced and credited as an independent titled program.)