Klossner, N. Jayne, Introductory Maternity Nursing (2005): "The fetal stage is from the beginning of the 9th week after fertilization and continues until birth"
«Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart» Pediatrics 111 (4 Pt 1): 844–850. April 2003 doi:10.1542/peds.111.4.844. PMID12671122..
«Altered breast development in young girls from an agricultural environment» Environ. Health Perspect. 114 (3): 471–5. March 2006 doi:10.1289/ehp.8280. OCLC.1392245PMID16507474..
«Hypothesis: exposure to endocrine-disrupting chemicals may interfere with timing of puberty» Int. J. Androl. 33 (2): 346–59. April 2010 doi:10.1111/j.1365-2605.2010.01051.x. PMID20487042..
nih.gov
ncbi.nlm.nih.gov
«Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart» Pediatrics 111 (4 Pt 1): 844–850. April 2003 doi:10.1542/peds.111.4.844. PMID12671122..
«Altered breast development in young girls from an agricultural environment» Environ. Health Perspect. 114 (3): 471–5. March 2006 doi:10.1289/ehp.8280. OCLC.1392245PMID16507474..
«Hypothesis: exposure to endocrine-disrupting chemicals may interfere with timing of puberty» Int. J. Androl. 33 (2): 346–59. April 2010 doi:10.1111/j.1365-2605.2010.01051.x. PMID20487042..
«germinal stage»Mosby's Medical Dictionary, 8th edition. (Elsevier.). Aipuaren errorea: Invalid <ref> tag; name "germinal stage" defined multiple times with different content
«Altered breast development in young girls from an agricultural environment» Environ. Health Perspect. 114 (3): 471–5. March 2006 doi:10.1289/ehp.8280. OCLC.1392245PMID16507474..
