At what stage of development is the human embryo most susceptible to teratogens?

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Question: At what stage of development is the human embryo most susceptible to teratogens?

Options:

Correct Answer: First trimester

Solution:

The first trimester is when the embryo is most susceptible to teratogens, as major organs are forming.

At what stage of development is the human embryo most susceptible to teratogens?

At what stage of development is the human embryo most susceptible to teratogens?

Step 1: Understand what a teratogen is. A teratogen is something that can cause birth defects in a developing embryo or fetus.
Step 2: Learn about the stages of human development. The development of a human embryo is divided into three trimesters.
Step 3: Focus on the first trimester. The first trimester is the first three months of pregnancy.
Step 4: Recognize that during the first trimester, major organs and body systems are forming in the embryo.
Step 5: Conclude that because the major organs are developing during this time, the embryo is most vulnerable to teratogens in the first trimester.

Teratogens – Substances that can cause developmental malformations in an embryo or fetus.
Embryonic Development Stages – The stages of development in an embryo, particularly the first trimester when major organs are forming.
Critical Periods – Specific times during development when the embryo is particularly vulnerable to environmental factors.