From Lostpedia

One of many pregnancies shown in Lost

Many pregnancies have been featured in Lost. Additionally, unknown conditions on the Island have led to fertility problems among the Others, as well as an immune system related condition that causes women who become pregnant on the Island to die. Notably, Kate lied and claimed she was pregnant with Aaron at the time of boarding Flight 815, to explain Claire's baby when she was rescued as part of the Oceanic Six; this credibility of her story is questioned in the Season 4 DVD extra The Oceanic Six: A Conspiracy of Lies.

Fertility and pregnancy issues on the Island

The Island: a dangerous place for a pregnant woman

Fertility

• There appears to be some evidence that, in 2001, women on the Island suffer from a form of degeneration of their reproductive organs. In "Not in Portland", Richard Alpert showed Juliet a scan of a woman in her 20s, though they seemed more fitting of a woman in her 70s in terms of signs of reproductive capability. Juliet was told that this would be one of the things she would investigate on the Island.
• It has not been explicitly stated that this problem was solved by Juliet's research, or indeed even actually existed, but we know that during the tenure Juliet spent on the island, women were dying after becoming pregnant, suggesting that infertility was no longer an issue, if it ever was to begin with.
• Island males, on the other hand, see their sperm counts multiply five times normal, so that each dose contains 300 to 400 million sperm. (Healthy normal sperm counts are 40 to 50 million per sample.) This is probably connected to the Island's healing properties.

Pregnancies on a Timeline

• It is important to note that evidence suggests a lack of pregnancy complications up to and during 1977. We see Ethan Rom born on the island in July of 1977 without complications, an event that is seemingly ordinary to life on the island.
• However, at some point after Ethan's birth, pregnancy issues plague the inhabitants of the Island, eventually leading to the recruitment of fertility expert Juliet Burke and her subsequent research on pregnant women on the island.
• In "D.O.C.", Juliet states that if the mother conceived off-Island, they will most likely survive the pregnancy. However, if the baby was conceived on the Island, the mother will likely die before their third trimester, as a result of the mysterious issues surrounding the location.
• According to Juliet, "The problem occurs somewhere during the second trimester, when the mother's immune system is triggered. The white blood cell count plummets. It's like the … immune system turns on the fetus." ("The Other Woman")
• According to Juliet, "In about three weeks [approximately the end of Sun's first trimester], you'll be in an almost constant state of nausea. A week after that, you will experience shortness of breath that won't go away. A week after that, you will lose consciousness and slip into a coma. And then, you will die. And when your heart stops beating … so will the baby's. If you go [back to Locke's camp] … you will die. And your baby will never be born." ("Ji Yeon")
• According to this report, once pregnancy complications begin to occur on the island, pregnant women that do not leave the island can expect to die somewhere after their 100th day of pregnancy. ("Ji Yeon")

Observations

• It is quite possible that Ethan Rom was the last successful locally-fertilized birth on the island.
• Any occurrence that could have effected pregnancies on the island would have to have occurred after the date of Ethan's birth in July of 1977.
• It is possible that Ben's leadership is the cause of the infertility problem as only the Others seem to be affected by it, and there are no cases of it prior to Ben leading. Sun's baby was concieved on the island(which Juliet said was the problem) but was birthed succesfully, albeit off the island. Ben wasn't healed by the island/Jacob either suggesting that the island/Jacob wasn't protecting him or new members being born to the Others under his leadership.
• It is possible that these pregnancy complications could be related to a number of other post-1977 island complications including but not limited to: the Sickness, the quarantine warnings, and/or the Incident.
• It is unlikely that the vaccine has anything to do with pregnancy issues as it is seen being administered to male DHARMA staff members. The vaccine was also being administered to new recruits as early as 1972 well before Ethan's birth. Furthermore Desmond and Kelvin were taking the drug for years after the Incident.

Juliet Burke

Main article: Juliet Burke

In the outside world, Juliet developed a drug in 2001 for degeneration-based infertility. She tested this treatment on her sister Rachel Carlson who was infertile from cancer treatment, and her sister was able to successfully become pregnant. Her sister later carried the child through to a successful birth. Her work attracted the attention of the Others, who recruited Juliet and brought her to the island to solve their infertility problems. It is unknown whether Juliet was able to solve the former problem of degeneration in reproductive capacity, or whether it was truly a problem and not a flippant example by Alpert, but Juliet did work on ensuring that pregnant mothers survived their pregnancies. However, Juliet's proved unsuccessful, with the mothers always dying during pregnancy, including Sabine and Henrietta ("Not in Portland")  ("One of Us")  ("The Other Woman")

Juliet was unable to find a solution to the immune problem. She theorized that the problem occurred at conception and proposed to Ben a plan where she would take a subject off the island for conception to test the theory, but Ben rejected the idea of anyone leaving the island.

An ultrasound image of Aaron, taken before the crash of Oceanic Flight 815

When Oceanic Flight 815 crashed on the island, however, Claire Littleton was 8 months pregnant. She provided the Others with the perfect control case, and having conceived off-island meant Juliet could test her theory about the immunity issue being related to something occurring at conception on the Island. Juliet has said that Ethan, who had infiltrated the mid-section passengers, took blood samples from Claire, but soon discovered that her results were consistent with other mothers who later died on the Island during their pregnancies (despite conceiving off-island). Juliet claimed Ethan began treating Claire and administering injections. These injections were said by Juliet to be her created drug. ("One of Us") Ethan was seen injecting Claire with a drug that had the same DHARMA Initiative label as the vaccine. ("Maternity Leave"). It seems unlikely, however, that the vaccine and Juliet's serum were one in the same as Desmond and other male staff members of the DHARMA Initiative were also given injections of the vaccine.

According to Juliet, when Ethan's identity was eventually discovered, he decided to kidnap Claire on his own initiative. Claire was kept at the Staff medical facility, where she was given more drug treatments, and her medical condition was closely observed ("One of Us")

Claire escaped from the Staff with the help of Alex. As she was leaving, the medical team of the Others was seen preparing for a surgical procedure probably involving Claire. Alex said that they intended to cut the baby our of her ("Maternity Leave"). Ethan pursued Claire and demanded that she be returned to him. He was captured in an attempt to kidnap Claire again and was afterward shot six times while lying unarmed on the ground by Charlie resulting in his death ("Homecoming"). Claire gave birth without complications to Aaron and after Ethan's death there were no further attempts to kidnap either Claire or the baby.

Claire at one point was concerned that Aaron was ill and obtained some of the vaccine that Desmond had taken every nine days at the Swan. It is unclear how much of the drug Claire gave Aaron or how long she continued to give it to her child.

It was later revealed that Claire has an "implant" under the control of the Others. The activation of the implant was able to induce what was said by Juliet to be a withdrawal symptom from no longer having injections of her serum, within 48 hours. However, this is obviously a lie as it was the Others who activated the implant to cause Claire to be symptomatic. Juliet administered an injection of the vaccine to Claire, but it is unclear if this had any effect in her recovery. ("One of Us")

Juliet then discovered that Sun was pregnant, and revealed that if she conceived off-island, there was a likelihood that the mother and child would both live (confirming Juliet's original theory). However, Sun discovers she became pregnant on the Island, causing Juliet to admit that without help, Sun will die before her third trimester. ("D.O.C.")

In fortuitous circumstances, however, Sun does manage to escape the Island, and is shown having a healthy baby in South Korea. ("Ji Yeon")

Occurrences of pregnancy

The following characters have been pregnant, or have taken pregnancy tests.

	Mother	Father	Positive Pregnancy	End Result
	Ana Lucia Cortez	(Presumed) Danny*	‎	Unborn baby was killed by Jason McCormack
	Beth*	her husband*		Died before giving birth
	Cassidy Phillips*	James "Sawyer" Ford		Gave birth to Clementine Phillips
	Kate Austen	Kevin Callis*		Pregnancy test was negative
	Rachel Carlson*	Injection		Gave birth to Julian Carlson
	Sarah Shephard*	Jack Shephard		Pregnancy test was negative
	Sarah Shephard*	Unknown		Pregnancy starts sometime in late 2006/early 2007, as seen in April 2007 flash-forward
	Susan Lloyd*	Michael Dawson		Gave birth to Walter Lloyd
	Henrietta*	Unknown		Died from pregnancy
	Sabine*	Unknown		Died from pregnancy
	Claire Littleton	Thomas*		Gave birth to Aaron Littleton
	Danielle Rousseau	Robert		Gave birth to Alex
	Sun-Hwa Kwon	Jin-Soo Kwon		Gave birth to Ji Yeon Kwon off-Island
	Emily Linus*	Roger Linus*		Died after giving birth to Ben
	Emily Locke*	Anthony Cooper		Gave birth successfully to John Locke three months premature
	Penelope Widmore	Desmond Hume		Gave birth successfully to Charlie
	Amy	Horace Goodspeed		Gave birth successfully to Ethan, 2 weeks premature

(*) Flashback character

Details are listed below, sorted by episode.

Season 1

• Claire Littleton was shown pregnant at the beginning of the series. She was 8 months pregnant at the time of the crash ("Pilot, Part 1")
• Claire took a pregnancy test, and it shows she was pregnant. ("Raised by Another")
• Beth was pregnant. She died because Christian Shephard was intoxicated while performing an operation. ("All the Best Cowboys Have Daddy Issues")
• Susan Lloyd was shown pregnant with Walt. She gave birth to Walt in the same episode. ("Special")
• Emily tells Locke that he was "immaculately conceived", although she apparently meant that he had no father, not that he was free from original sin. (This statement is obviously false, and is revealed to be a part of a con by Anthony Cooper.) ("Deus Ex Machina")
• Claire Littleton gave birth to Aaron. ("Do No Harm")
• Danielle Rousseau revealed that she was 7 months pregnant when she arrived on the Island; a week after her baby daughter was born, the child was taken by the Others. ("Exodus, Part 1")

Season 2

• Ana Lucia Cortez was pregnant, but her unborn child was killed by Jason McCormack. ("Collision")
• Sarah Shephard told Jack that she had taken a pregnancy test. She said it was negative. ("The Hunting Party")
• Kate told Sun that she once took a pregnancy test. ("The Whole Truth")
• Sun was told she is not able to get pregnant, because her husband Jin is infertile. ("The Whole Truth")
• Sun took a pregnancy test, and is confirmed pregnant. ("The Whole Truth")

Season 3

• Cassidy becomes pregnant with Clementine by Sawyer. ("Every Man for Himself") ("Left Behind")
• Kate told her husband that her pregnancy test was negative. ("I Do")
• 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 Rachel fertile. Dr. Alpert asks her to examine the CT scan of an unusual womb. ("Not in Portland")
• Ben claims "I was born on this island. Not many of my people can say that." ("The Man from Tallahassee") - In fact he was born in a forest 32 miles outside Portland. ("The Man Behind the Curtain")
• Rachel is revealed to have given birth to her son, Julian, two years prior to present time. ("One of Us")
• For reasons as yet unknown, pregnancy on the Island is fatal. Juliet was brought to the island to find a cure. She witnessed the death of many women as a result of their pregnancies, including Sabine. The women's immune systems treat the fetus as an invasive organism. Claire is the only known woman on the Island to have survived pregnancy and childbirth according to Juliet. ("One of Us")
• Emily Linus gives birth to her son Ben and dies soon afterwards. ("The Man Behind the Curtain")
• Sarah Shephard is shown to be pregnant, father is presumed to be not Jack. ("Through the Looking Glass")
• Kate reminds Sawyer that the Others are coming for the pregnant women, and that she could be one of them. Sawyer says they should hope she's not pregnant.
• Ben claims that the reason he brainwashed Karl was because he did not want him to get Alex pregnant. ("Through the Looking Glass")

Season 4

• Sawyer broaches the topic of Kate's possible pregnancy on Claire's porch at the Barracks, Kate discusses babies with Claire, and then the following morning, Kate tells Sawyer she's sure she's not pregnant. ("Eggtown")

Season 5

• Penelope gives birth to a son. He is named Charlie, after Charlie Pace. ("Jughead") Charles is also the name of her father, but this tribute to him is inadvertent.
• Amy gives birth to a son, Ethan, at the DHARMA Initiative Barracks. ("LaFleur")
• Ellie is cautioned against helping move the Jughead due to her pregnancy. ("The Incident, Parts 1 & 2")

Recurring themes

Father missing during birth

• Thomas left Claire when she was still pregnant. ("Raised by Another")
• Ana Lucia's relationship with Danny ended before she could tell him she was pregnant. ("Collision")
• Sawyer did not find out Cassidy was pregnant until after Clementine was born. ("Every Man for Himself")
• A father was never mentioned for Rachel's son. ("Not in Portland")  ("One of Us")
• John Locke's father was not around when he was born. ("Cabin Fever")
• Horace Goodspeed was unconscious and not around when Ethan was born. ("LaFleur")
• Jin was believed to be dead while Sun was giving birth. ("Ji Yeon")
• The father of Alex was already dead when Danielle Rousseau gave birth. ("This Place Is Death")

Out of the many births in the series, Ben and Charlie Hume appear to be the only ones who had their fathers present.

Separation after negative pregnancy test

• Sarah left Jack shortly after seeing a negative pregnancy test. ("A Tale of Two Cities")
• Kate left Kevin Callis shortly after seeing a negative pregnancy test. ("I Do")

Virgin conception

• In "Deus Ex Machina", Locke is told by his mother, Emily Annabeth Locke, that he was "immaculately conceived", although she meant that he had no father (i.e. "virgin birth"), not that he was free from original sin. However, she reveals later in the episode the true identity of Locke's father, implying she lied to keep his whereabouts a secret.

Premature birth

• John Locke was born three months premature. ("Cabin Fever")
• Ben was born two months premature. ("The Man Behind the Curtain")
• The public believe that Aaron was born to Kate approximately 3 months early. ("Eggtown")  ("There's No Place Like Home, Part 1")
• Ethan was born two weeks premature. ("LaFleur")

Unanswered questions

For fan theories about these unanswered questions, see: Pregnancies/Theories

• Why do pregnant women die on the Island?
• When did the medical complications of pregnancy first occur on the Island?

See also

• Pregnancy test
• Children
• The Others#Pregnancy issues