Hello you can check the article I have shared.

<span style="color:#3B5998;"><b><a href="http://app.babychakra.com/article/2706">Anomaly Scan: An Effective Tool To Detect Defects In The Baby Before Birth</a></b></span>

The second scan is known as anomaly scan. Anomaly Scan or mid-pregnancy scan is an ultrasound scan done between the 18th and 21st week of pregnancy to take a closer look at the baby and the womb (uterus) and to have an idea where the placenta is lying. The scan aims to look for any major physical abnormalities in the growing baby.

After 16th May I will go for second ultra sound wht should I take care and wht I should observe