It is completely normal for women to show differently during pregnancy. Factors such as body type, muscle tone, and the position of the baby can all contribute to how prominently the baby bump is visible. Additionally, first-time mothers tend to show later than those who have been pregnant before. If you are concerned about your lack of a noticeable baby bump at 18 weeks and 5 days, it is always best to consult with your healthcare provider for reassurance. They can perform an ultrasound or physical examination to ensure everything is progressing as it should be. Remember that every pregnancy is unique, so try not to compare yourself too much with others. Focus on taking care of yourself and enjoying this special time in your life!