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.
Typically, the term baby might be used to refer to any child from birth to age 4. Newborn usually refers to babies from birth to about two months of age. Infants are babies from two months to one year old. Toddlers are babies from one year to four years of age. Others may have different definitions of these terms.