Summary
In humans the embryo becomes a fetus after eight weeks, growing until birth around nine months.
In depth
Trimester 1: organ formation; 2: growth, movement felt; 3: lung maturation and weight gain. The fetus is about 50 cm and 3.4 kg at term. Nutrition, alcohol, smoking and infections affect outcomes.
Growth is rapid in late pregnancy; fat deposits build up. Lung surfactant matures around weeks 34 to 36. Fetal circulation bypasses lungs via the foramen ovale and ductus arteriosus.
Example: at birth these shunts close as the baby starts to breathe.
Frequently asked questions
What is Fetal Development?
In humans the embryo becomes a fetus after eight weeks, growing until birth around nine months.
Which area of biology covers Fetal Development, and how advanced is it?
Fetal Development is one of the 54 topics in Developmental Biology. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Embryo, Neurulation, Teratogens.
Can you give an example of Fetal Development?
Folic acid prevents neural tube defects.
What should I learn before Fetal Development?
Fetal Development is a Beginner topic, so no earlier topic is required. Other Beginner topics in Developmental Biology that pair well with it include Fertilisation, Zygote, Embryo.
What topics are related to Fetal Development?
The closest topics to Fetal Development are Embryo, Neurulation, Teratogens, Growth. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Fetal Development?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Fetal Development. To practise the whole of Developmental Biology, use the Developmental Biology quiz.
How is Fetal Development different from Embryo?
Fetal Development: In humans the embryo becomes a fetus after eight weeks, growing until birth around nine months. Embryo: The early developmental stage of an organism produced by division of the zygote. Read both side by side and note what each one explains.
How should I study Fetal Development step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Embryo and explain the difference aloud. Finally, take the Developmental Biology quiz and come back to this page for any question you miss.