Conception to birth, tracked scientifically rather than sentimentally, using 4D ultrasound scans and computer animation to show what happens inside the womb week by week. The film opens at fertilization and moves through the earliest structural changes: exposed nerve endings forming after fifteen days, a heart taking shape from a mass of muscle cells at twenty-two days, and an embryo that still looks gelatinous at thirty days even as eyes and limbs begin to appear. By eleven weeks the fetus is shown kicking on scan, and later footage catches the reflexes and behaviors that develop through the third trimester. Poet Roger McGough voices the fetus at each stage, giving the biology a running first-person commentary rather than a detached narration. The film also follows how the mother's body changes to sustain the pregnancy, treating gestation as a two-way physiological event rather than a one-sided process. It sticks to observable development, milestone by milestone, through all nine months to delivery.