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Because the first 10-12 weeks are the developmental stages, without some things your baby will not continue to grow correctly. Ask your doctor for more information. At this stage it's really important that you not breathe in any harmful toxic chemicals.

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15y ago
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13y ago

Because this is the time of pregnancy when the baby forms all of its organs. A fetus is basically completely formed by 10 weeks after conception. From that point on, the baby basically just grows and gets stronger.

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Q: Why the first trimester of pregnancy is such a critical time of development?
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Related questions

Which trimester is most critical for the development of a baby?

The first trimester is most critical for the development of a baby. The babies brain is formed during the first trimester.


What is the definition of early pregnancy?

The definition of early pregnancy is known as the first trimester. The duration of the first trimester is 12 weeks, and includes conception, implantation, development of the embryo and development of the fetus.


What are the first two months of development in the uterus called?

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What are the major phases of antenatal development?

There major phases of antenatal development are commonly divided into three trimesters. The first trimester involves embryogenesis. The second and third trimester involves fetal development. The pregnancy is considered viable from the third trimester onwards.


What is the first trimester of pregnancy?

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What do people mean when they say in the first trimester' of a pregnancy?

A trimester contains the prefix 'tri' as in triangle - and it means 3 or a third. The first trimester of a pregnancy therefore means the first third of the pregnancy and as a pregnancy is 9 months long, it refers to the first 3 months.


What is first trimester?

The first trimester begins from the moment you conceive until the 12th or 13th week of pregnancy.


Is the first trimester the first three months of pregnancy?

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It is part of the first trimester


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What hormones could be implicated in failing to maintain the pregnancy during the first trimester?


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