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birth |
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birthAct of producing live young from within the body of female animals. Both viviparous and ovoviviparous animals give birth to young. In viviparous animals, embryos obtain nourishment from the mother via a placenta or other means. In ovoviviparous animals, fertilized eggs develop and hatch in the oviduct of the mother and gain little or no nourishment from maternal tissues. See also pregnancy. |
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| Some data implicate viral infections during pregnancy and other prenatal or birth difficulties as early influences on schizophrenia, as well as on disorders ranging from autism to dyslexia (SN: 5/1/93, p. |
birth difficulties
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