Closing the uterus and the skin
Small technical choices with long-term consequences.
The uterus is usually closed in one or two layers. The choice may affect how the scar heals and how likely a pocket, or niche, forms in the wall. That is covered in the next-pregnancy stage.
The fat layer. When it is more than 2 cm thick, closing it with stitches reduces the wound coming apart. In a meta-analysis, the wound disruption risk fell by about a third (relative risk 0.66), with an absolute risk reduction of 6.2%, meaning about 16 women need this step for one to avoid a wound opening.
The skin. A meta-analysis of 5 trials and 877 women found more wound complications with staples than with a subcuticular stitch (odds ratio 2.12), and more wound separation (odds ratio 4.07), though staples saved about 5 minutes of operating time. That review reports odds ratios without pooled absolute rates for either group.