Maternal instinct may refer to:

• The maternal bond that forms between a mother and her child
• "Maternal Instinct" (Stargate SG-1), a 2000 episode from the American-Canadian TV series Stargate SG-1
• "Maternal Instinct", an episode of the American animated television series Danny Phantom

• Lacuna magna
• Lacuna (manuscript)
• Lacuna (manuscripts)
• Lacuna model
• Lacuna (music)
• Lacunar
• Lacunaria
• Lacunaria panamensis
• Lacunar infarct
• Lacunar infarcts
• Lacunar ligament
• Lacunar stroke
• Lacunar syndromes
• Lacunary function
• Lacunary series
• Lacunary value
• La cuna vacía
• Lacu Negru River
• Lac Unique
• Lac Unique, New Brunswick
• Lacunæ
• La Cura (Thirstin Howl III album)
• La curee
• Lacurile
• Lacus