A male sheep that has reached breeding age is called a ram. A younger male sheep is referred to as a ram lamb while a newborn is simply a lamb.
Male sheep reach puberty six to eight months after birth while female sheep sometimes begin maturing a month earlier. Both males and females are able to breed when they are 8 to 10 months old. Sheep are capable of breeding once or twice a year, usually during the late fall or early winter. Adult female sheep, ewes, are pregnant for 145 to 155 days. A typical sheep lives six to 11 years.