The first Trimester: Key Stages, Changes, and Essential Care for a Healthy Start to Pregnancy

The first trimester of pregnancy spans from the first day of your last menstrual period to the end of the 13th week. During this time, the fertilized egg implants in the uterus, triggering the development of the fetus’s major organs, including the heart, brain, and spine. The fetus progresses from a cluster of cells to about 3-4 inches in length with visible features like fingers, toes, and a detectable heartbeat by 12 weeks.

Expect physical and emotional changes due to hormonal shifts, including mood swings, fatigue, nausea, breast tenderness, and frequent urination. It’s essential to begin prenatal care promptly, including routine checkups, screenings, and ultrasounds to monitor fetal health.

To support a healthy pregnancy, avoid alcohol, tobacco, recreational drugs, certain foods (like raw fish and unpasteurized products), and activities that may pose risks to you or the fetus. Engage in moderate exercise, stay hydrated, eat balanced meals, and take prenatal vitamins, especially folic acid. Contact your healthcare provider if you experience symptoms like high fever, severe cramping, heavy bleeding, persistent vomiting, or dizziness.