Ultrasound is done today on my 5 weeks 4 days (LMP 8 Sept 2016) pregnancy as there was a light brownish pinkish blood discharge yesterday. My ultrasound scan report says" uterus appears bulky and show a single intrauterine gestational sac. Gestational sac reveals smooth well-defined rounded margins. Decidual reaction seen. Mean sac diameter is approx. 10mn corresponding to 5 weeks 4 days. No obvious fetal pole seen. No free fluid is seen in the cul-de-sac" Please explain me the above. Is there any issue with the sac.