Citations:heteropaternal


 * 2005 — Isaac Blickstein, "Superfecundation and Superfetation", in Multiple Pregnancy: Epidemiology, Gestation & Perinatal Outcome (eds. Isaac Blickstein & Louis G. Keith), Taylor & Francis (2005), ISBN 1842142399, page 105:
 * However, in its 'pure' sense, these heteropaternal twins were not the result of a superfecundation because they were produced by inseminating retrieved eggs of the same ovulation cohort.
 * 2006 — Nicholas Wade, Before the Dawn: Recovering the Lost History of Our Ancestors, Penguin Press (2006), ISBN 9781101052839, page 154:
 * Of fraternal twins born to white women in the United States, 1 in 400 pairs is estimated to have two fathers. Among cases where paternity is disputed, 2.4% of cases have been found to be heteropaternal.
 * 2008 — Hannah Holmes, The Well-Dressed Ape: A Natural History of Myself, Random House (2008), ISBN 9781400065417, page 188:
 * Identical twins are more common than heteropaternal twins, and less common than fraternal twins.