in fetuses (in utero) 25-30: shortly after premature birth 50-60 mmHg
||Human Homo sapiens
||Malik S et al., Neurogenesis continues in the third trimester of pregnancy and is suppressed by premature birth. J Neurosci. 2013 Jan 9 33(2):411-23. doi: 10.1523/JNEUROSCI.4445-12.2013 p.412 left column 2nd paragraphPubMed ID23303921
||Soothill PW, Nicolaides KH, Rodeck CH, Gamsu H. Blood gases and acid-base status of the human second-trimester fetus. Obstet Gynecol. 1986 Aug68(2):173-6PubMed ID3090491
||Primary source abstract: "Maternal arterial, umbilical venous, and umbilical arterial blood were obtained at fetoscopy in the second trimester and analyzed for blood gases and acid-base indexes."
||P.412 left column 2nd paragraph: "Neurogenesis is temporally regulated, and premature birth might affect it. Oxygen is a key regulator of neurogenesis (Panchision, 2009). Oxygen concentration in cerebral circulation is 25–30 mmHg in fetuses (in utero), which increases to 50–60 mmHg shortly after premature birth (primary souurce)."