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.
4 tips for coping with an enlarged prostate. When a man reaches about age 25, his prostate begins to grow. This natural growth is called benign prostatic hyperplasia (BPH) and it is the most common cause of prostate enlargement. BPH is a benign condition that does not lead to prostate cancer, though the two problems can coexist. Although 50% to 60% of men with BPH may never develop any symptoms, others find that BPH can make life miserable.