In spite of her success in 1969, she subsequently failed to win an individual medal internationally. The quality of competition greatly improved, with Marilyn Neufville of Jamaica improving the world record by seventh tenths of a second just ten months after Duclos's feat. Instead Duclos went on to be a medallist only with the national relay team. The 1970 European Athletics Indoor Championships saw her win gold in a novel medley relay event. At the 1971 European Athletics Championships she helped the French women to the relay final, but the team failed to finish. Her last two international medals came in the short-lived 4×380 metres relay at the 1972 and 1973 European Athletics Indoor Championships, where she was a bronze, then silver medallist.