Medicine and Healthcare. Black stools can be due to iron supplements or excess iron in the diet. The most serious cause of black stools is bleeding in the GI tract, due to ulcers or some other cause. If the stool is black due to blood, it usually has a tarry feel. If there is just a black color, most likely it is not blood.
Yes, but most doctors will not do it that early. Yes, a vasectomy can be performed on an 18 year old, depending on the circumstances. Yes, a vasectomy can be performed on an 18 year old, depending on the circumstances. 1 year ago by Stephen F. Shaban, MD.
May 5, 2004 -- As many as one in 100 vasectomies may fail to prevent pregnancy within five years of the procedure, a new study shows. Researchers say that the study shows that like other birth control methods, vasectomies are not always 100% effective. The study showed that six pregnancies were reported among 540 women within six weeks to 1.5 years after their husbands had a vasectomy.