Chakrabarty started his career as a member of the faculty at
NRS Medical College. During his time here he met and collaborated with
Subhash Mukherjee, who delivered Durga, India's first baby by
in vitro fertilisation (IVF). Chakrabarty collaborated with Mukherjee on various topics related to fertility medicine. Chakrabarty continued the duo's research after Mukherjee's suicide in 1981. The institute focused on
assisted reproductive technologies and research. He donated the institute to the
Indian Council of Medical Research (ICMR) in 2019. As of 2019, the institute treated about 3,000 couples seeking assisted reproductive support annually. Some of his other contributions included advancing
embryo transfer technology and development of cost-effective
ovulation induction protocols for women after multiple IVF failures. He received a Lifetime Achievement Award in 2019 from the
West Bengal government. == Personal life ==