Hello Doctor, I am married from last 1 year. My lmp was on 16 aug and in sept I got positive pregnancy test. 1 week I had back pain and abdominal pain in early morning. I do not get any ultrasound till 10th nov. Then on 11 nov I have some bleeding then I go to doctor she gave me k stat injection and some tablet to clot blood. Then on 12 nov I had heavy bleeding and I passed a blood clot and a grey coloured oval shaped 2 cm tissue. Then on scanning doctor said there is only blood clots in uterus nothing else, so they do my abortion. Please tell me what can be the cause of that.