MSH: The unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. In humans, the unborn young from the end of the eighth week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN.,NCI: The developing offspring from 7 to 8 weeks after conception until birth.,FMA: Fetal structure, which is a developmental form of a vertebrate animal at any given time point from 8 weeks of gestation to birth (or hatching). Examples: There is only one fetus.,NCI: An unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature being.

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