my lmp was 7 nov. but i have delayed conception. so corrected lmp was 19 nov. in 1st usg babys cardiac activity is not seen. in second usg after 15 days cardiac activity was present. after 15 days in 3rd usg everything was normal like babys heartbeats was present. growth was normal. but today i went for sonography and i came to know that babys cardiac activity is absent. i have comoleted 11 wks but babys growth was jast of 9 weeks 1 day. dr said its missed abortion and told me to do D and C on monday. why this is happened?? i was taking progesterone injections too.