 During her research work Plug traveled widely to many countries to enhance her knowledge base and participated in many meetings of the International Council of Archaeozoologists (ICAZ) of which she is now a Council member.Ina Post was born on 5 August 1941 in Amsterdam, Netherlands to parents Gerritdina Fransina (née Bruinenberg) and Jan Post; she was their only daughter.Following the end of World War II the family had moved to South Africa, traveling on the ship "Pretoria Castle" in 1949.