At the time, this was the highest rated TV show in history. 71.7% of all American television sets were tuned in.
Desi Arnaz, Jr was born on the same day this episode was broadcast.
This was the first appearance on this series for Charles Lane (Mr. Stanley, the other father in the hospital waiting room). He frequently appeared as the perfect stern comic foil for Lucy's character in this series and later on The Lucy Show (1962).
Had Desi, Jr. turned out to have been a girl, he would have been named Victoria Dolores.