Absolutely, walking is a great form of exercise during pregnancy, including in the early stages. A 3 km walk is generally safe if you're already comfortable with that distance. However, it's always a good idea to consult your doctor about your exercise routine to ensure it aligns with your specific health needs during pregnancy. Stay hydrated, avoid overheating, and listen to your body – if you feel discomfort or fatigue, it's important to rest. Walking at a moderate pace can help maintain your fitness, reduce pregnancy discomforts, and is beneficial for both you and your baby's health.