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8. Trends in monozygotic and dizygotic twinning rates by maternal age and parity. Further analysis of Italian data, 1949-1985, and rediscussion of US data, 1964-1985. Allen G, Parisi P. Acta Genet Med Gemellol (Roma); 1990; 39(3):317-28. PubMed ID: 2085067 [Abstract] [Full Text] [Related]
9. Gestational age in twins. James WH. Arch Dis Child; 1980 Apr; 55(4):281-4. PubMed ID: 7191240 [Abstract] [Full Text] [Related]
11. A review of the mechanisms and evidence for typical and atypical twinning. McNamara HC, Kane SC, Craig JM, Short RV, Umstad MP. Am J Obstet Gynecol; 2016 Feb; 214(2):172-191. PubMed ID: 26548710 [Abstract] [Full Text] [Related]
12. Superfecundation identified by HLA, protein, and VNTR DNA polymorphisms. Wenk RE, Houtz T, Chiafari FA, Brooks M. Transfus Med; 1991 Dec; 1(4):253-5. PubMed ID: 9259857 [Abstract] [Full Text] [Related]
14. Twinning in southern Israel; secular trends, ethnic variation and effects of maternal age and parity. Picard R, Fraser D, Hagay ZJ, Leiberman JR. Eur J Obstet Gynecol Reprod Biol; 1989 Nov; 33(2):131-9. PubMed ID: 2583338 [Abstract] [Full Text] [Related]
15. Use of dizygotic to monozygotic twinning ratio as a measure of fertility. Tong S, Caddy D, Short RV. Lancet; 1997 Mar 22; 349(9055):843-5. PubMed ID: 9121260 [Abstract] [Full Text] [Related]
16. [A case of twins with probable superfetation (author's transl)]. Bertrams J, Preuss H. Z Rechtsmed; 1980 Mar 22; 84(4):319-21. PubMed ID: 6937032 [Abstract] [Full Text] [Related]