This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis of Pregnancy, Subject name: Gynaecology & Obstetrics
A lady presented with 7 weeks amenorrhea with slight vaginal spotting. CRL was 5 mm with well - formed gestational sac with calculated GA of 5+6 weeks on TVS. However cardiac activity could not be seen. Next line of management? 
Select and explain. 
A. Wait for another 1 week and repeat TVS, B. Surgical or medical evacuation, C. Wait for another 4 weeks, D. Serum hCG levels
A: Wait for another 1 week and repeat TVS
Answer: A: Wait for another 1 week and repeat TVS 
Explanation: Indications for non-ble pregnancy - G-sac >= 25 mm size with no Yolk sac or fetal pole CRL >= 7 mm with no cardiac activity G-sac is seen but fetal pole or cardiac activity are not seen even after 2 weeks G-sac and yolk sac are seen but fetal pole or cardiac activity are not seen even after 11 days Yolk sac >= 7 mm and no fetal pole or cardiac activity seen In this case the CRL measured was 5 mm and the Gestational age calculated was 5+6 weeks, therefore waiting for one week to ten days to repeat an USG to see for appearance of cardiac activity since it cannot be called a non ble pregnancy as yet.