Proofread the following sentences. Insert punctuation as required.

After a Maylard incision was made through the abdomen a retractor was used for visualization of the pelvic contents.

Ahh! Thank you for spelling grammar correctly.

A comma is needed after abdomen. It sets off the introductory dependent clause.

After a Maylard incision was made through the abdomen, a retractor was used for visualization of the pelvic contents.