Towards the end of pregnancy, each testicle creates a passage (process vaginalis) as it travels into the scrotum.
If this passage fails to close and is quite wide, the abdominal lining and sometimes bowel can bulge through it, causing a lump to form in the groin area. This is called an inguinal hernia.
The operation to repair an inguinal hernia involves moving any abdominal lining and/or bowel back into the abdomen and closing off the passage.
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