The Department of family planning was established in the year 1966. The following are the details regarding the establishment of the department:

Background:
- In the 1950s and 1960s, India's population growth rate was rapidly increasing.
- The government realized that population control measures were necessary to promote economic development and improve the standard of living.

Establishment:
- In 1965, the Indian government established the Family Planning Bureau under the Ministry of Health and Family Planning.
- The Bureau was later upgraded to a full-fledged department in 1966 and was renamed as the Department of Family Planning.

Objectives:
- The primary objective of the department was to promote family planning and control population growth.
- The department aimed to provide family planning services and education to people across the country.
- It also aimed to improve maternal and child health by promoting safe and healthy childbirth practices.

Activities:
- The Department of Family Planning conducted various activities to achieve its objectives, such as:
- Setting up family planning clinics and centers.
- Providing contraceptives and family planning education to the public.
- Conducting research to improve family planning methods.
- Encouraging the use of traditional methods of contraception.
- Promoting the use of safe delivery practices.

Impact:
- The establishment of the Department of Family Planning had a significant impact on India's population growth rate.
- The department's efforts, along with other population control measures, led to a decline in the population growth rate from 2.4% in the 1960s to around 1.2% in the 2010s.
- The department's activities also helped improve maternal and child health and reduce infant mortality rates.

In conclusion, the Department of Family Planning was established in 1966 with the aim of promoting family planning and controlling population growth in India. The department conducted various activities to achieve its objectives and had a significant impact on India's population growth rate and maternal and child health.