Toothed whales (Odontoceti) this group includes dolphins and orcas. These whales eat meat.   Baleen whales (Mysticeti) This group includes the Blue whale, Grey whale â¦ and Minke. They pull in a mouthful of seawater and feed on plankton.
Weight Gain Patterns. Between 1 to 4 months of age, an infant will generally gain 1 1/2 to 2 pounds per month, explains HealthyChildren.org, the website published by the American Academy of Pediatrics. From 4 to 7 months, his weight gain will slow to 1 to 1 1/2 pounds each month. A healthy baby boy will weigh between 14 1â2 and 17 1â2 pounds at 8 months; infant girls normally weigh about half a pound less than infant boys. By 12 months of age, a baby weighs about three times more than she did at birth.
By one month, most infants will gain about a pound over their birth weight. At this age, infants are not as sleepy, they begin developing a regular feeding pattern, and they have a stronger suck during feedings. On average, infants gain about one pound each month until they are 6 months old. Most babies double their birth weight by 5 months of age and triple their birth weight by the time they're 1 year old. The average weight of a 6-month-old is about 16 pounds (7.3 kg), and the average weight of a 1-year-old is approximately 21Â½ pounds (9.8 kg). Boys may be bigger than girls, and breastfed infants may weigh less than formula-fed infants.