I Love Lucy Episode Synopsis (w/images):
“Ricky Loses His Voice” & “Lucy is Enceinte (Pregnant)”

“Ricky Loses His Voice”:

Episode #43 (Syndicated episode #44)
DVD: On the Season 2 box set, it is attached to episodes #43-48 along with the bonus feature My Favorite Husband episode “Mrs. Cooper Thinks Liz Is Pregnant” along with “Behind The Scenes Featurette: Excerpts from “Laughs, Luck…and Lucy” by Jess Oppenheimer with video from “Lucy’s Showbiz Swan Song” & “Lucy In Enceinte (Pregnant).” On the blu ray set, it is attached to along with bonus features like flubs and the same My Favorite Husband episode.
Air Date: Mon. 12/1/52

“Lucy Is Enceinte (Pregnant)”:

Episode #44 (Syndicated episode #45)
VHS: Attached to “Lucy Goes To The Hospital” on some tapes. On other tapes, it is attached to “Lucy Goes To The Hospital” & “Lucy Hires An English Tutor.”
DVD: On the Season 2 box set, it is attached to episodes #43-48 along with the bonus feature My Favorite Husband episode “Mrs. Cooper Thinks Liz Is Pregnant” along with “Behind The Scenes Featurette: Excerpts from “Laughs, Luck…and Lucy” by Jess Oppenheimer with video from “Lucy’s Showbiz Swan Song” & “Lucy In Enceinte (Pregnant).” On the blu ray set, it is attached to along with bonus features like flubs and the same My Favorite Husband episode.
Air Date: Mon. 12/8/52

Note: When CBS FOX video released this for the first time in the early 90s, they added the word “(Pregnant)” in the title in the box since Enceinte is the French word for pregnant. Back in the 50s, this episode not only almost didn’t air due to the then-controversial nature (how times have changed), people were convinced it was the end of the show. Desi brought in three religious people who looked at the script and approved of it so CBS decided to air it but they didn’t want the word “pregnant” mentioned, so they used the word Enceinte which is French for pregnant somehow thinking no one would notice.
Also, the final scene is shown on the I Love Lucy Christmas Special. Originally, when the special was colorized, this and other flashback scenes weren’t until 2015 when it was colorized.

Also I can definitely say that I remember when the baby episodes aired on Nick (and later TV Land), they showed “Lucy is Enceinte” BEFORE the five flashback episodes. However local syndication like WNYW did the opposite however the first scenes in those flashback episodes were edited out.