First trimester

First Trimester is the initial stage of pregnancy that lasts for the first 12 weeks. This period is crucial for the development of the fetus and involves numerous changes in the mother's body.

Overview

The first trimester begins on the first day of your last period and lasts until the end of week 12. This means that by the time you know for sure you're pregnant, you might already be five or six weeks pregnant. A lot happens during these first three months.

Changes in the Mother's Body

During the first trimester, the body undergoes many changes. Hormonal changes affect almost every organ system in the body. These changes can trigger symptoms even in the very first weeks of pregnancy.

Fetal Development

By the end of the first trimester, the fetus has developed all its organs and systems and will start to grow in size and weight.

Health and Safety

Pregnant women should maintain a healthy lifestyle throughout the first trimester to ensure the health of the fetus. This includes proper nutrition, regular exercise, and avoiding harmful substances.

See Also

• Pregnancy
• Second Trimester
• Third Trimester

References

First trimester Resources
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