Possible Clues:

• Painkilling drug passed into the small of one's back
• Delivery assist
• English reverse decline by trimming countryside - it makes things easier for those responsible for new arrivals
• Aid in labor management?
• Feeling duller at end of term?
• Childbirth anaesthetic
• Anaesthetic injected into one's back
• Anaesthetic often administered during childbirth
• Takes the pain out of delivering papers in Peru ordered by gangster
• Labor day offering?