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What happens in my body during the first trimester of pregnancy?

Hilda Y. Hutcherson, MD
OBGYN (Obstetrics & Gynecology)
The first trimester of pregnancy is a time of drastic hormonal changes. Although your developing baby is tiny, big things are happening to you. Fatigue, nausea, constipation, and breast tenderness are common. Feeling lightheaded is another common complaint of early pregnancy. In addition, all of the hormonal changes cause mood swings.

During the first trimester, you should begin to visit your doctor regularly for prenatal care.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.