My wife is 7 weeks pregnant. Her first day of last period was on 14 July 2018. We did the pregnancy test in home two weeks ago using PregaNews & the result was positive. On Monday we consulted with ob-gynecologist & she prescribed us to take the scan. After seeing the scan she told us that still heart beat is not there so she asked us to come on 14 Sep. She has also given MCBM 69 TABLET for folic acid. I'm really worried about my wife's pregnancy & baby growth. I have some questions below. 1) What week does a fetus heart start beating? 2) What are the tests, Screening & Scans need to done during first trimester? 3) Is it safe to have sex during pregnancy?