page_title: Timeline of human prenatal development
section_title: Week 35
hierarchical_section_title: Timeline of human prenatal development / Changes by weeks of gestation / Changes by weeks of gestation / Week 35
context_page_description: Gestational age is the time that has passed since the onset of the last menstruation, which generally or as standard occurs 2 weeks before the actual fertilization. Embryonic age, in contrast measures the actual age of the embryo or fetus from the time of fertilization. Nevertheless, menstruation has historically been the only means of estimating embryonal/fetal age, and is still the presumed measure if not else specified. However, the actual duration between last menstruation and fertilization may in fact differ from the standard 2 weeks by several days.
  Thus, the first week of embryonic age is already week three counting with gestational age.
  Furthermore, the number of the week is one more than the actual age of the embryo/fetus. For example, the embryo is 0 whole weeks old during the 1st week after fertilization.
  The following table summarizes the various expression systems during week number x of gestation.
context_section_description: Gestational age: 34 weeks old.
  Embryonic age: Week nr 33. 32 weeks old.
  The fetus reaches a length of about 40–48 cm (16–19 in).
  The fetus weighs about 2.5 to 3 kg (6 lb 10 oz)to 6 lb 12 oz).
  Lanugo begins to disappear.
  Body fat increases.
  Fingernails reach the end of the fingertips.
  A baby born at 36 weeks has a high chance of survival, but may require medical interventions.
caption: Fetus at 38 weeks after fertilization.[10]
exif: {}