This is a test which can be done during the second trimester of pregnancy, when the woman is about 18–24 weeks pregnant. It can be an abdominal ultrasound or transvaginal ultrasound.If a baby is born with cyanotic heart disease, the diagnosis is usually made shortly after birth due to the blue colour of their skin (called cyanosis).If a baby is born with a septal defect or an obstruction defect, often their symptoms are only noticeable after several months or sometimes even after many years. Classification
A number of classification systems exist for congenital heart defects. In 2000 the International Congenital Heart Surgery Nomenclature was developed to provide a generic classification system. Hypoplasia
Hypoplasia can affect the heart, typically resulting in the underdevelopment of the right ventricle or the left ventricle. This causes only one side of the heart to be capable of pumping blood to the body and lungs effectively. Hypoplasia of the heart is rare but is the most serious form of CHD. It is called hypoplastic left heart syndrome when it affects the left side of the heart and hypoplastic right heart syndrome when it affects the right side of the heart. In both conditions, the presence of a patent ductus arteriosus (and, when hypoplasia affects the right side of the heart, a patent foramen ovale) is vital to the infants ability to survive until emergency heart surgery can be performed, since without these pathways blood cannot circulate to the body (or lungs, depending on which side of the heart is defective).
Tobi may refer to:

Tobi (given name), a unisex name
Tobi (island), island in the Palauan state of Hatohobei
Tobian language, the language of Tobi
Hatohobei, an island and the southernmost of Palaus sixteen states
Tobi (month), in the Coptic calendar
Tobi!, a 2009 television series
Tobramycin, an antibiotic drug that is sold under the brand name "Tobi"
Tobi (Naruto), the alias of Obito Uchiha, one of the primary antagonists in the anime and manga series Naruto Shippuden
ToBI, a standard for transcribing English intonation
Tobi shokunin or tobi for short; construction workers in Japan
Tobi trousers, the typical piece of clothing of tobi shokunin
Texas Oilmans Bass Invitational (TOBI)
Tobi (1978 film)

See also
Tobias
Toby (disambiguation)