? About my mc

I posted about my miscarriage i just went through a week ago and friday when they done the dnc i asked what would happen to my baby and they said baby would be sent off to lab...my question is now what? Did they do that to test baby for reasons for the mc or just told me that to keep me calm...my main thing stuck in my head is that they just threw baby in the trash like nothing ever happened....i have my doctor appointment the 28th and i dont know what will happen at it. My last dnc was a blightend ovam so baby was never formed but this time baby was 7wks..