Many think of it as 'sticking.' implantation in humans always occurs when the embryo is between 6-7 days old. A very popular concept on the internet now in 2012, 'implantation bleeding, ' is speculative and mostly not useful.
Also, urinary stones can form in the bladder lining due to an accumulation of debris and chemicals. Broken blood vessels can cause blood in the urine, often because of torn or enlarged veins on the inner surface of the prostate. Blood in the urine also can be caused by the sudden stretching of the bladder wall.
If a person has bladder cancer, blood eventually reappears. Usually, the early stages of bladder cancer cause bleeding but little or no pain or other symptoms. Blood in the urine does not always mean you have bladder cancer.More often it is caused by other things like an infection, benign (non-cancerous) tumors, stones in the kidney or bladder, or other benign kidney diseases. But it is important to have it checked by a doctor so the cause can be found.f a person has bladder cancer, blood eventually reappears. Usually, the early stages of bladder cancer cause bleeding but little or no pain or other symptoms. Blood in the urine does not always mean you have bladder cancer.