• The female gives birth to a single young.

The Malagasy mongoose experiences several distinct developmental stages beginning with the embryonic stage, during which the embryo develops inside the mother's body; at birth, the young are small and blind, and their eyes open immediately. The infant stage lasts from one day to three months, during which the mother feeds them milk and protects them. The species reaches sexual maturity between one year and six months and two years and seven months of age. The adult stage begins after this period and lasts from one year to thirteen years and eight months. A typical lifespan for the species ranges from nineteen years and six months to thirty-two years and six months, although the maximum recorded lifespan is twelve years.