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From Lostpedia

An ultrasound of Aaron, one of the children on Lost

Children and pregnancies are both regular topics on Lost.

Occurrences

The following children were seen on the Islands or are related to the main characters:

		Mother	Father	Relevance
	Aaron Littleton	Claire Littleton	Thomas	On the Island
	Annie	Unknown	Unknown	On the Island
	Alexandra Rousseau	Danielle Rousseau	Robert	On the Island
	Ana Lucia's unborn baby	Ana Lucia Cortez	Danny	Unborn Child of Ana Lucia
	Clementine Phillips	Cassidy Phillips	Sawyer	Daughter of Sawyer
	Emma	Unknown	Unknown	On the Island
	Karl	Unknown	Unknown	On the Island
	Julian	Rachel	Uncertain	Juliet's nephew
	Megan Pace	Karen Pace	Liam Pace	Niece of Charlie
	Ji Yeon Kwon	Sun-Hwa Kwon	Jin Kwon	Sun's child, currently in Korea
	Walt Lloyd	Susan Lloyd	Michael Dawson	Left island with father
	Zach	Unknown	Unknown	On the Island

Details of when any child was shown or was mentioned in Lost are given in the next sections, sorted by episode.

Season 1

• Megan Pace was playing in the backyard when Charlie visited Liam. ("The Moth")
• Sawyer aborted a con after he saw a boy that reminded him of his past. ("Confidence Man")
• Aaron Littleton was kidnapped in utero, along with his mother. ("Raised by Another")
• An unborn baby was lost after Christian Shephard accidentally killed Beth while operating on her drunk. ("All the Best Cowboys Have Daddy Issues")
• Shannon spent a year in Paris watching a child named Laurent. That's when she learned the song that helped Sayid understand the maps he took from Rousseau. ("Whatever the Case May Be")
• Aaron Littleton's mother, Claire, escaped Ethan Rom. ("Special")
• Jin threatens to beat up Byung Han in front of his daughter. ("...In Translation")
• A kid talked to Locke about Mousetrap in a toy store ("Deus Ex Machina").
• Aaron Littleton was born. ("Do No Harm")
• Alex Rousseau was kidnapped as a baby, and raised by the Others. ("Exodus, Part 1")

Season 2

• The poor man's son needed to go to the bathroom. ("...And Found")
• Sophie was cared for by Shannon for a year. ("Abandoned")
• Zach and Emma were both taken by the Others. ("The Other 48 Days")
• Ana Lucia's unborn baby was lost after she was shot. ("Collision")
• Charlie has a flashback in which he and his band play in a big child's crib for a commercial. ("Fire + Water")
• Sun was confirmed as pregnant. ("The Whole Truth")
• Christian Shephard demanded to see his daughter. ("Two for the Road")
• Charlotte Malkin's "death" and "miraculous revival" summoned Mr. Eko to investigate on behalf of the Catholic Church. ("?")

Season 3

• Karl was shown as a teenaged boy imprisoned by the Others. ("A Tale of Two Cities")
• Bobby was a boy living in the commune. ("Further Instructions")
• A picture of Clementine Phillips was shown to Sawyer while Sawyer was in prison. ("Every Man for Himself")
• Daniel asked Mr. Eko "Are you a bad man? My mother says you are a bad man." ("The Cost of Living")
• Juliet is revealed to be a fertility doctor. She has impregnated a male field mouse and successfully uses a new drug to make her sister fertile. Dr. Alpert asks her to examine the CT scan of an unusual womb. ("Not in Portland")
• While staying in Phuket a young Thai boy sold Jack sodas on the beach. ("Stranger in a Strange Land")
• The children kidnapped by the Others, including Emma and Zach are seen. ("Stranger in a Strange Land")
• The children are later seen again with the Others at the ruins. ("The Brig")

Childhood/Teen-Hood flashbacks

Children

Many characters have had flashbacks that feature themselves as children:

Young Jack Shephard	Young Charlie Pace	Young Mr. Eko	Young Hugo Reyes
Young James Ford	Young Sun-Hwa Paik	Young Benjamin Linus	Young John Locke

Season 1

• A young Jack Shephard talks to his father about being beaten up at school. ("White Rabbit")
• Young Sawyer is seen talking to his mother. ("Outlaws")
• Young Kate's voice is heard on a tape. ("Born to Run")

Season 2

• Younger versions of Eko and his brother Yemi are first seen. ("The 23rd Psalm").
• Younger versions of Charlie and his brother Liam are seen at Christmas time. ("Fire + Water")

Season 3

• Young Sun-Hwa Paik is seen in the opening scene of "The Glass Ballerina".
• A young Eko is seen again with a younger Yemi. ("The Cost of Living")
• A young Hurley Reyes is seen talking to his father. ("Tricia Tanaka Is Dead")
• Young Ben arrives on the Island with his father. ("The Man Behind the Curtain")
• Young Charlie is taught how to swim at Butlins by his father. ("Greatest Hits")

Season 4

• An infant Locke is born, and at age 5, is visited by Richard Alpert. ("Cabin Fever")

Teenagers

Many characters have had flashbacks that feature themselves as teenagers:

Season 1

• Kate has a flashback wich contains her and her childhood sweatheart, Tom listening to a tape recorder which contained an entry of Kate and Tom as teenagers (around 12-13 years old). "Born to Run"

Season 2

• Shannon's flashbacks in "Abandoned" take place with her at the age of 18.

Season 4

• One of Locke's flashbacks in "Cabin Fever" takes place while he is attending high school and living with his foster parents(at approximately 16 years old).