Please choose the correct ending to complete the given sentence: Health: [header] How to get a vasectomy [title] Learn the overview of the procedure. [step] The vasectomy is a simple surgery that will cut the tubes carrying sperm to be mixed with semen. It has been proven effective as a method of birth control for males and the vasectomy is usually an outpatient procedure, using only a localized anesthetic.

Ending1: There are no painful side effects, but the procedure itself will have side effects such as decreased sperm production, nausea, abdominal problems and headaches. [title] Decide if you are a man or woman. Ending2: The procedure is painless and maintains no negative effects for humans. [substeps] The procedure is performed exactly as instructed by doctors and generally looks exactly the same. Ending3: [substeps] It can take between 10 and 24 hours for the vasectomy to occur, as the sperm must be trapped and relocated to their future uterus before the operation can be conducted. In most cases, vasectomies can last for six to 12 years. Ending4: [substeps] Vasectomies are considered permanent. Although some may be reversible, there are no guarantees.

Answer format: ending1/ending2/ending3/ending4