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Week 3 Pregnancy Guide | Bumpies
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Week 3 Pregnancy Guide

Updated: August 25, 2026 5 min read
Important Note: This pregnancy calendar is created for general awareness and educational purposes only. Every pregnancy is different, and symptoms, baby growth, scans, and medical needs may vary from person to person. Please consult your doctor or healthcare provider for personalised medical advice. Baby-size comparisons are approximate and used only to help you simply visualise your baby's growth.

Your baby is the size of a

🍎
apple seed

Pregnancy Symptoms at 3 Weeks

At 3 weeks pregnant, early implantation might trigger exceptionally mild spotting or subtle cramping as nesting begins.

Belly & Baby Development

Fertilization occurs, forming a rapidly dividing blastocyst that travels down toward the uterine lining.

Precautions & Tips

  • Continue daily intake of your high-quality prenatal vitamin.
  • Eat nutrient-dense, whole meals regularly.
  • Limit caffeine intake to moderate safe levels.

Your Checklist for Week 3

  • Track any instances of light tracking or spotting.
  • Prioritize magnesium-rich foods to help soothe cramps.
  • Keep active with low-impact movements.
This content is for general pregnancy awareness only and does not replace medical advice. Please consult your doctor for any symptoms, scans, medication, diet, or pregnancy-related concerns.