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.
The causes of enlarged prostate (BPH) are not fully understood but it is known that the main risk factor is age and nearly a third of men over 50 are thought to have symptoms. Over 50% of men in their 60âs and nearly all men in their 70âs are thought to suffer some symptoms of enlarged prostate. For most men, the prostate will start to enlarge in the 40âs or 50âs.