Understanding the fetal weight at 21 weeks in grams is essential for expectant parents and caregivers monitoring healthy pregnancy progress. At this stage, the average fetal weight is approximately 350-400 grams, marking crucial growth and development milestones. Learn about typical fetal growth patterns, factors that can influence fetal weight at 21 weeks, and tips for supporting optimal development through nutrition and prenatal care. Whether you are tracking your baby’s growth, preparing for future appointments, or looking for reliable information, this guide provides science-based insights, actionable advice, and answers to frequently asked questions. Empower your pregnancy journey with knowledge about what to expect at 21 weeks, how fetal weight is measured, and when to consult healthcare providers about fetal growth.