Morning sickness and miscarriage

Is it true that if you have morning sickness that’s a good sign that your pregnancy is progressing? I’ve researched and read that.. I’m 7 weeks today and my nausea was worse last week at 6 weeks never vomited just nausea. I’m 7 weeks exactly today and I’m not getting much nausea. Well it’s the morning it normally hits me at home during the evening. Is this true though?