Question

When is an embryo called a fetus? How big is a fetus? How much bigger will the fetus grow by the time of birth?

a) After 8 weeks; 3 inches; Doubles in size
b) After 12 weeks; 6 inches; Triples in size
c) After 20 weeks; 10 inches; Quadruples in size
d) After 28 weeks; 15 inches; Quintuples in size

Answer 1

An embryo is termed a fetus after the eighth week of fertilization. By the 38th week, a fetus is typically 51 cm (20 inches) long and weighs between 2.7 and 4.6 kg (6-10 pounds). Between becoming a fetus and birth, the fetus undergoes significant growth and organ development.

Step-by-step explanation:

An organism's developmental stage is referred to as an embryo until the end of the eighth week after fertilization. After this point, the organism is called a fetus. The transition from embryo to fetus marks the beginning of major growth and organ development that will continue until birth, around 38 weeks after fertilization.

By the 38th week, the fetus is fully developed and ready for birth. It measures about 51 cm (20 inches) in length and weighs between 2.7 and 4.6 kilograms (6-10 pounds). The fetus grows substantially from the time it is termed a fetus after 8 weeks until birth, with the most vital development occurring in terms of weight gain, length, and organ development.