The dream about vasectomy, foretells about the fears the dreamer has especially if he is the man. Perhaps you are unhappy with your sexual life, therefore you dream of vasectomy, where the mans power to bring the new life is destroyed. Alternatively, the dream may indicate your anxiety about having the vasectomy in your waking life.
Dream dictionary: tomy dream meanings
Dreams related to anatomy may indicate that the diseases will be healed.
If you have a hysterectomy in a dream, then it denotes to something new in your waking life. You will have a fresh start.