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.
Conditions that can lead to symptoms similar to those caused by enlarged prostate include: 1  Urinary tract infection. 2  Inflammation of the prostate (prostatitis) 3  Narrowing of the urethra (urethral stricture)  Scarring in the bladder neck as a result of previous 1  surgery. Bladder or kidney stones.  Problems with nerves that control the bladder.