• An unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature being.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• Developmental organism from 8 weeks of gestation to birth.
  Foundational Model of Anatomy
  University of Washington, 2017
• Late stage in the prenatal development of an animal. This stage occurs from the closure of the hard palate until birth.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• The developing offspring from 7 to 8 weeks after conception until birth.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• 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.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• Fetus, the unborn young of any vertebrate animal, particularly of a mammal, after it has attained the basic form and structure typical of its kind. A brief treatment of the fetus follows. For more information on the human fetus, see pregnancy. Biologists arbitrarily speak of the earliest stages of...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020