It's possible you're referring to a marmoset, a small New World monkey that is sometimes called a "finger monkey" due to its small size. If this is what you're interested in, here's a simplified description of their life cycle:
Marmoset Life Cycle:
1. Gestation: Marmosets have a gestation period of about 145-150 days.
2. Birth: They usually give birth to twins, sometimes triplets. The babies are born with fur and open eyes, but are relatively helpless.
3. Infancy: The babies are dependent on their parents for food and care, typically being carried on their backs for the first few months.
4. Weaning: They begin to wean around 4 months of age, but may still rely on their parents for food and protection for several more months.
5. Adolescence: They reach sexual maturity around 18 months of age.
6. Adulthood: Marmosets can live for up to 10-15 years in the wild, and even longer in captivity.
Important Notes:
* Social structure: Marmosets live in family groups with multiple adults, and everyone helps care for the young.
* Habitat: They are found in the Amazon rainforest and other parts of South America.
* Conservation: Some species of marmosets are endangered due to habitat loss and the pet trade.
If you're interested in learning more about marmosets, you can search for "marmoset life cycle" or "marmoset facts" online.