Gender Development (03:43)
Gender develops during the eighth week of pregnancy. Meet Jonny from the Barahona Province, Dominican Republic. Jonny is genetically male but was born without a penis.
In the Barahona Province, one in 90 males are born without a penis and raised as females. These men did not produce dihydrotestosterone in the womb, the hormone that transforms the tubercle into a penis.
During puberty, the men in the Barahona Province born without a penis will have their testicles drop and grow a penis.
Facial Development (02:33)
During the fourth week of pregnancy, the face begins to form, layering five sheets of cells. The most common condition with face development is a cleft lip or palate.
Cleft Lip (04:05)
Meet Oliver, an infant with a cleft lip. Watch as Felicity Mehendale surgically fixes the cleft.
During the tenth week of pregnancy, fingerprints begin to develop. In a small percentage of people, they do not form, a condition known as Immigration Delay Disease.
Dominant Hand (04:21)
During the 11th week of pregnancy, a fetus begins developing a dominant arm. About 90% of the world is right-handed; the left-handed trait has the advantage in a fight. Meet Tom Stalker, a left-handed boxer.
During the 13th week of pregnancy, skin color begins to develop. Ethnicity can create additional melanin resulting in darker skin. Albinism is a congenital disorder characterized by little or no melanin production.
Albino United (02:20)
Albino people in Tanzania face prejudice. Albino United formed to support the Albino community.
Blood Cancer (02:04)
During the 14th week of pregnancy, individuality and survival ability develops. Meet Jo, a Surrey woman with blood cancer.
Immune System (04:13)
During the 14th week of pregnancy, the immune system develops. Everyone's immune system is varied to protect the human race; this can make transplant options difficult. Jo hopes for a donor.
Daredevil Behavior (03:49)
During the 15th week of pregnancy, brain connections begin to form. Risk taking behavior develops in varying amounts.
Nature vs. Nurture (04:57)
Risk taking behavior begins with testosterone in the womb but can increase depending on a person's upbringing. The influx of testosterone increases our competitiveness.
During the 16th week of pregnancy, the brain develops a gender. This occurs two months after the body has physically developed a gender. Meet Maddie, a seven year old transgender girl.
Parenting Transgender Children (03:46)
Estimates vary, but it is thought that one in 10,000 is transgender. See a preview of the next episode of "9 Months That Made You."
Credits: One of a Kind: 9 Months That Made You (00:42)
Credits: One of a Kind: 9 Months That Made You
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