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1. recently born; called also neonatal.
postmature newborn (post-term newborn) post-term infant.
premature newborn (preterm newborn) preterm infant.


Relating to the period immediately succeeding birth and continuing through the first 28 days of extrauterine life.
Synonym(s): newborn
[neo- + L. natalis, relating to birth]


/neo·na·tal/ (ne″o-nāt´'l) pertaining to the first four weeks after birth.


Of or relating to a newborn infant or to the first 28 days of an infant's life: neonatal care.

ne′o·na′tal·ly adv.


Etymology: Gk, neos + L, natus, born
the period of time covering the first 28 days after birth.


adjective Referring to the newborn period, by convention, the first 4 wks after birth


Relating to the period immediately succeeding birth and continuing through the first 28 days of life.
Synonym(s): newborn.
[neo- + L. natalis, relating to birth]


Pertaining to a new-born baby.


(of newborn offspring, particularly human) the first month of independent life.


Describes babies just after they are born.


Relating to period immediately after birth through first 28 days of extrauterine life.
[neo- + L. natalis, relating to birth]

neonatal (nē´ōnā´təl),

adj pertaining to a newborn child.
neonatal cytomegalovirus infection,
n a disease caused by any of the viruses in the cytomegalovirus family (part of the herpesvirus family). It is transmitted to a newborn child through the birth process or contact with bodily fluids.
neonatal teeth,
n the presence of teeth within 1 month of birth. See also natal teeth.


pertaining to the period immediately after birth; the duration varies between species; in humans refers to the first four weeks of life; in animals the first week seems appropriate. Some neonatal disorders are listed in entries below. Others are listed elsewhere under titles specific to their anatomic location, including hyaline membrane disease, respiratory distress syndrome.

neonatal cardiac murmur
is observed in foals and most disappear before the fifth day. Persistence after that time may suggest valvular dysfunction. Many congenital murmurs are functional and cause no signs of disease.
neonatal diarrhea
see undifferentiated diarrhea of the newborn.
neonatal distress
see neonatal maladjustment syndrome (below).
neonatal edema
usually caused by obstruction to lymphatic flow by defective development of lymph drainage system.
neonatal hyaline membrane disease
see hyaline membrane disease.
neonatal hyperbilirubinemia
see neonatal jaundice (below).
neonatal hypoglycemia
a metabolic disease of newborn piglets caused by restriction of food intake. Clinical signs include weakness, shivering, hypothermia and terminal convulsions.
neonatal isoerythrolysis
see alloimmune hemolytic anemia of the newborn.
neonatal isoimmune purpura
see neonatal thrombocytopenic purpura (below).
neonatal jaundice
is an important clinical sign in foals because of the possibility of alloimmune hemolytic anemia. Some cases of benign, physiological jaundice also occur in foals. There is jaundice but no other clinical or pathological abnormality. Called also neonatal hyperbilirubinemia.
neonatal maladjustment syndrome
a disease of newborn thoroughbred foals caused by premature severance of the umbilical cord in assisted foalings and by hypoxia due to other causes. The foals may be normal for some hours after birth. Clinical signs include aimless wandering, apparent blindness, and convulsions including a sound like a dog barking. Called also barkers and wanderers.
neonatal mortality
death in the neonatal group.
neonatal neoplasm
occurs rarely. Lymphosarcoma, benign and malignant melanoma and myeloid leukosis are recorded. Sporadic bovine leukosis, manifested by many subcutaneous tumors, is the most common form of the disease.
neonatal ophthalmia
see ophthalmia neonatorum.
neonatal septicemia
many bacteria, which are not widely invasive in older animals, can cause septicemia in neonates because of their immunological immaturity; common examples are Escherichia coli, Listeria monocytogenes, Salmonella spp., streptococci, e.g. S. suis.
neonatal spasticity
an inherited disease of calves which are normal at birth but soon develop a susceptibility to tetanic convulsions when stimulated. See also neuraxial edema.
neonatal streptococcal infection
occurs in all species, but is especially important in piglets and foals. Bacteremia and septicemia may result in the animal's death or the development of arthritis, endocarditis, meningitis or ophthalmitis. Causative bacteria are: foals—Streptococcus zooepidemicus (S. pyogenes equi); piglets—S. suis types 1 and 2, S. equisimilis; calves—S. pyogenes; lambs—S. faecalis and group C streptococci.
neonatal thrombocytopenic purpura
a severe bleeding disease in piglets a few days old which have drunk colostrum containing antiplatelet antibody from their alloimmune dam.
neonatal vigor
amount of physical activity displayed by the newborn animal; an indication of the potential viability of the patient.

Patient discussion about neonatal

Q. Should I vaccinate my newborn against Hepatitis B? I am 9 months pregnant and am expecting to give birth anytime soon. I understood that my newborn will receive a vaccine against Hepatitis B in the hospital. Why is this so?

A. because this is bullshit! Hey! Wake up! the lymph system of your baby will only be "ready and finished" after three years! so how should your baby manage a toxic vaccination? do you know what they put in the vaccination? they put hepatitis B pathogens/virus with the hope that your baby will be able to build an anti-hepatitis B pathogen and so manage itself in the future hepatitis B! how should your baby do that, when his lymph-system just started to develop itself and will only be ready in three years? please read in the links i send to you:

before you would like to go on with any vaccination, you should check out this very long list of links:

at the bottom you will also find links in english. vaccinations in general are very disputable/dubious and it is probably time that we learn about it.

Q. Is there a bigger risk of autism for the newborn in twin pregnancy?

A. thanks Dominicus!
you're great...

Q. I gave birth a short while ago, and since then I just can't stand my husband. is that normal? It's very strange, because we used to be such a great couple but since the baby came into our lives, I am tired all the time, and basicaaly every thing he does gets me so annoyed. Could it be the hormones? will we get back to how we used to? (This is a great site - I feel I can finally ask questions I was too ashamed to ask my family and friends :)

A. you are tiered. it's normal. if you get more then 2 hours a night sleep you are lucky. when i'm tired i am annoyed. very natural. you can add the hormones- and you get couple of weeks of wife was unbearable after birth.

More discussions about neonatal
References in periodicals archive ?
To examine whether the altered methylation patterns in SVs from mice treated neonatally with DES might be affected by the expression level of the epigenetic modifiers, we used realtime PCR to investigate the RNA levels of DNA methyltransferases, including DNMTs (DNMT1, DNMT3A, and DNMT3B) and MBDs (MeCP2, MBD2, and MBD3), as well as two histone modifiers (HDAC1 and HDAC2).
In addition, when mice treated neonatally with MSG were followed to adulthood, they were found to be obese and, in the case of females, sterile (23).
According to an international statistician with the National Center for Health Statistics, one of the biggest factors in the decrease in the infant mortality rates for the US and worldwide is the use of surfactants neonatally on low birth weight and very low birth weight infants that hospitals would have previously been unable to save.
Androgens are essential for male reproductive development and the experimental disruption of their actions with dibutyl phthalate results in reduced testis size and level of sperm production in adult rats, provided they are exposed to the chemical both in utero and neonatally (Sharpe).
Impaired behaviour, learning and memory, in adult mice neonatally exposed to hexabromocyclododecane (HBCDD).
Wen and colleagues demonstrated that PUUO induced neonatally in rats was associated with the development of progressive hydronephrosis.
Depending on when a child was exposed, maternally or neonatally, and how severe that exposure was, it might explain the range of the symptoms of autism.
Expression pattern of troponin I and distinct alternatively spliced developmental isoforms of troponin T in vitro and in neonatally denervated rat skeletal muscles.
Screening and diagnosis of abnormal Hb and thalassemia may need to be undertaken antenatally, neonatally, and in certain hematologic situations.
It's also possible that the results reflect the increased survival of babies weighing under 800 g at birth, a group at an inherently higher risk of brain hemorrhage, particularly PVL, which may go undetected neonatally because head ultrasound can only detect lesions larger than 1 mm.
If thyroid deficiency occurs neonatally or in childhood, mental retardation occurs and growth is retarded; the resulting malformation of facial bones characterizes juvenile hypothyroidism or cretinism.
For example, cats rendered decorticate neonatally are capable of complex social behaviors and of learning stimulus discrimination coupled to an adaptive motor performance, in contrast to the more severe deficits of adult-lesioned animals.