The "C" in D&C is sort of a misnomer. The OB/GYN who performed my D&C told me that they use "vacuum aspiration," which is
not a "dilation and curettage." Vacuum aspiration has become
way more common than the former method used. The term "D&C" sort of got grandfathered in.
I had to be dilated overnight but it was still done using vacuum aspiration. He doesn't use curettes unless absolutely necessary (like if the aspiration doesn't remove everything). A D&E is where they have to forgo the aspiration and use surgical instruments to remove the contents manually.
He told me that the distinction is often made along the guidelines of gestation, but not all doctors agree on this. Some doctors draw the line at 11 weeks and other will draw the line at 12 or even 13 depending on their capabilities. It get trickier in the second trimester. Some doctors will call any procedure that uses vacuum aspiration a D&E, though, even if it's done in the first trimester. That's becoming more common. Very few doctors use curettes anymore. They can scar.
Here is some more information:
Vacuum aspiration - Wikipedia, the free encyclopedia
Dilation and evacuation - Wikipedia, the free encyclopedia
Dilation and curettage - Wikipedia, the free encyclopedia
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TTC Board Co-Host
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Amy and Benny - TTC #1 
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Always missing our precious baby boy
Lost on Friday, February 19, 2010 - 12w5d
We will forever carry you in our hearts 
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"Deus da mihi castitatem et continentiam. Sed noli modo."