Small
The 20 week ultrasound will determine if the baby is developing normally. The baby's size and the position of the umbilical cord will show. It is also possible to find out the baby's sex at 20 weeks.
The average stomach size of a one-week-old baby is about the size of a cherry or a small marble.
A 2-week-old baby's stomach is about the size of a walnut, holding around 1-2 ounces of milk or formula at a time.
A 3-week-old baby's stomach is about the size of a walnut, holding around 1-2 ounces of milk or formula at a time.
20 pounds.
A 6-week-old baby's stomach is about the size of a large chicken egg, holding around 2-4 ounces of milk or formula at a time.
A 3-week-old baby's stomach is usually about the size of a walnut, holding around 1-2 ounces of milk or formula at a time.
Around week 20.
Play of the Week - 1959 A Very Special Baby 1-20 was released on: USA: 22 February 1960
The weight is about 1 gram and it's 14-20 mm long so about the size of a bean. See link below.
A 2-week-old baby's stomach is typically about the size of a large marble, holding around 1-2 ounces of milk or formula at a time.
A 4-week-old baby's stomach is typically about the size of a large marble, holding around 2-4 ounces of milk or formula at a time.