When Lucy sits on the chair just before the baby shower, the magazine that she's reading (the January 1953 issue of "McCall's") says, "I Love Lucy" on the cover.
The sardines Lucy eats were real, but she really had them with mashed potatoes and gravy, not ice cream and chocolate sauce.
The book on the shelf of the headboard in Lucy and Ricky's bedroom is Try and Stop Me (1944) by Bennett Cerf.
The wild boar head on the wall of the East 68th Street Athletic & Recreation Society turns up two years later on the wall of Richard Widmark's home in The Tour (1955).
At Lucy's baby shower, a doll is prominently displayed on the sofa. Created by American Character Doll Company, the "I Love Lucy Baby Doll" was 16 inches long and included a drawer full of accessories. Because the gender of the Ricardo baby would not be announced until January 1953, the doll was not gender specific. Priced at $9.98, it turned out to be one of the best-selling toys of the 1952 Christmas season. The doll was introduced in "Pregnant Women are Unpredictable", where Lucy uses it to practice diapering.