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Most the of the organs/system in foetus ...

Most the of the organs/system in foetus are formed by the end of

A

`1^("st")` trimester

B

`2^("nd")` trimester

C

`3^("rd"}` trimester

D

First month

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question:** The question asks when most of the organs or systems in a fetus are formed. We need to identify the correct trimester or month during pregnancy when this development occurs. 2. **Fertilization and Development Stages:** - After fertilization, a zygote is formed. - The zygote develops into an embryo. - The embryo eventually develops into a fetus. 3. **Gestation Period:** - The typical gestation period for humans is approximately 9 months. - This period is divided into three trimesters: - 1st trimester (0-3 months) - 2nd trimester (4-6 months) - 3rd trimester (7-9 months) 4. **Development of Organ Systems:** - Most major organ systems begin to develop during the first trimester. - By the end of the first trimester (around 12 weeks), most of the major organs and systems, such as limbs, heart, and genitals, are formed. 5. **Development in Subsequent Trimesters:** - In the 2nd trimester, further development occurs, including the growth of hair and the separation of eyelids. - The 3rd trimester focuses on the maturation and growth of the fetus, but most organs are already formed. 6. **Conclusion:** - Based on the information, the correct answer to the question is that most of the organs or systems in the fetus are formed by the end of the **1st trimester**. **Final Answer: Option 1 (1st trimester)** ---
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