It is understandable to feel worried when there is a difference in baby growth during pregnancy. In your case, although the baby's growth is measuring slightly behind schedule at 7 weeks instead of 9 weeks, the presence of a heartbeat at 90 bpm is a positive sign. It indicates that your baby is developing and progressing well.
It's important to remember that every pregnancy is unique, and variations in growth can occur. There could be several reasons for this discrepancy, such as miscalculations in dates or individual differences in fetal development.
To gain more clarity and reassurance, it would be beneficial to follow up with your doctor for further evaluation. They may recommend additional ultrasounds or tests to monitor the progress of your pregnancy.
In most cases, as long as there is a heartbeat present, there are good chances that everything will be fine. However, it's always best to consult with your healthcare provider who can provide personalized guidance based on your specific situation.
During this time, try to stay positive and take care of yourself by maintaining a healthy lifestyle with proper nutrition and regular prenatal check-ups. Surround yourself with support from loved ones who can offer encouragement throughout your pregnancy journey.
Remember that stress and worry can impact both you and your baby, so try to focus on staying calm and optimistic while awaiting further medical guidance.