• In captivity it has lived more than 15 years.
• Litters usually contain 2–5 young.

European pine martens typically live from 13 years and 8 months to 22 years and 9 months, with a maximum lifespan of 18 years and 3 months, and a theoretical lifespan ranging from 9 years and 3 months to 18 years and 5 months. The species reaches sexual maturity between 11 months and 2 weeks and 1 year and 7 months. Eyes open at an age between 3 weeks and 1 month and 1 week; the embryonic stage involves a period of delayed development during which the embryo develops inside the mother’s body. Following birth, the young are blind, covered in sparse fur, and fed exclusively with the mother's milk during the infant stage. The adult stage lasts from 2 to 15 years, and during this time the animal reaches its full size and is capable of reproduction.