Klossner, N. Jayne, Introductory Maternity Nursing (2005): "The fetal stage is from the beginning of the 9th week after fertilization and continues until birth"
Anderson SE, Dallal GE, Must A (April 2003). “Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart”. Pediatrics111 (4 Pt 1): 844–850. doi:10.1542/peds.111.4.844. PMID12671122.
Buck Louis GM, Gray LE, Marcus M, Ojeda SR, Pescovitz OH, Witchel SF, Sippell W, Abbott DH, Soto A, Tyl RW, Bourguignon JP, Skakkebaek NE, Swan SH, Golub MS, Wabitsch M, Toppari J, Euling SY (February 2008). “Environmental factors and puberty timing: expert panel research needs”. Pediatrics121 Suppl 3: S192–207. doi:10.1542/peds.1813E. PMID18245512.
Mouritsen A, Aksglaede L, Sørensen K, Mogensen SS, Leffers H, Main KM, Frederiksen H, Andersson AM, Skakkebaek NE, Juul A (April 2010). “Hypothesis: exposure to endocrine-disrupting chemicals may interfere with timing of puberty”. Int. J. Androl.33 (2): 346–59. doi:10.1111/j.1365-2605.2010.01051.x. PMID20487042.
healthline.com
Sherk, Stephanie Dionne. "Prenatal Development". Gale Encyclopedia of Children's Health, 2006. Gale. 2013年12月1日時点のオリジナルよりアーカイブ。2013年10月6日閲覧。
nih.gov
pubmed.ncbi.nlm.nih.gov
Anderson SE, Dallal GE, Must A (April 2003). “Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart”. Pediatrics111 (4 Pt 1): 844–850. doi:10.1542/peds.111.4.844. PMID12671122.
Buck Louis GM, Gray LE, Marcus M, Ojeda SR, Pescovitz OH, Witchel SF, Sippell W, Abbott DH, Soto A, Tyl RW, Bourguignon JP, Skakkebaek NE, Swan SH, Golub MS, Wabitsch M, Toppari J, Euling SY (February 2008). “Environmental factors and puberty timing: expert panel research needs”. Pediatrics121 Suppl 3: S192–207. doi:10.1542/peds.1813E. PMID18245512.
Mouritsen A, Aksglaede L, Sørensen K, Mogensen SS, Leffers H, Main KM, Frederiksen H, Andersson AM, Skakkebaek NE, Juul A (April 2010). “Hypothesis: exposure to endocrine-disrupting chemicals may interfere with timing of puberty”. Int. J. Androl.33 (2): 346–59. doi:10.1111/j.1365-2605.2010.01051.x. PMID20487042.
