The birth mother of Chuckie Finster from the animated television series "Rugrats" is Melinda Finster. She is portrayed as a loving and caring mother who passed away when Chuckie was just a baby. Melinda is known for her love of flowers and is remembered by her son and the other characters in the series. In the episode titled "Mother's Day," Chuckie's father, Chas Finster, reminisces about her, and she is voiced by actress Kim Cattrall. This portrayal helps to humanize her character and provides insight into her relationship with her son and the impact of her absence on his life. The information about Melinda Finster can be found on various fan wikis and articles about the "Rugrats" series, such as on the Nickelodeon Wiki and Wikipedia.