system
Given the following post, respond as if you're commenting on Reddit:
human
When a woman gets a c-section during birth, does labor just turn off?

I guess I always imagined labor to be a process that can’t stop once it’s started, but at what point does your body send the signal to the brain to stop labor when a c section is performed?
gpt
The end of labor is delivery of the placenta. Whether that is vaginally or surgically, the complete detachment and removal of the placenta is the trigger for involution of the uterus to start (shrinking back to non-pregnant size).