hi dr,iam a nurse i had my tubal ligation with my second c/s 4 years back.now my beta hcg is high,150, my LMP was on 30/01/2011 and i have lower abdominal pain, last month my period was late for 10 days,that time beta hcg was high123 ,but after period also betahcg is not in tha normal leval what could be the reason?