#AskTheExpert can you please tell me some of the most important investigation and scans to be done during pregnancy

A. During pregnancy there are total for sonography to be done the 1st one in your early pregnancy to know about the baby's cardiac activity,( 7 - 8 weeks) 2nd is the NT scan which detects fetal defects if present( 11 - 12 weeks) 3rd scan is an anamoly scan to know about all the body parts of the baby ( 19 -20 weeks ) 4th is done during 9 month to know about baby's growth pattern and amniotic Fluid level( after 29 weeks)