#AskTheExpert On my first sonography doctor said baby should be of 8 weeks but only gsac 5.3 mm in size was visible so doctor told me it is 5 week pregnancy. After 15 days I did second sonography from another doctor who told us there is growth but heart beat is not visible. Also gsac size is 1.37 cm and fetal pole is also seen but the pregnancy is of 5.2 weeks. I am worried of such confusion of weeks and when the heart beat will come..