But a man may not have any of these symptoms and still have prostate cancer, says Gerald Chodak, MD, a Chicago urologist and author of Winning the Battle Against Prostate Cancer: Get the Treatment That is Right for You (Demos Health).
I had no idea there was so much discrepancy in opinion. Newborn is 0-3 months. Infant is 3-24months. Toddler is 2 until 4. 4-5 is preschooler. At 8-12 they become a tween. Teen is 13-18. Young adult is 18-29. 30-65 is middle age. 65+ is a senior.
A Dr. Diana K. Blythe, MD , Pediatrics, answered on behalf of Pediatric Associates. For purposes of first aid or CPR, consider infants to be less than one year old and children to be between one and twelve years old. If you cannot determine age well, they are infants until they walk and they are children until they show signs of puberty. You will not be right all the time if you use the walking and puberty rules, but they can help if you do not know exact age.