Warning: The NCBI web site requires JavaScript to function. more...
Generate a file for use with external citation management software.
Galton Laboratory, Department of Genetics and Biometry, University College, London.
It is estimated that at least one dizygotic (DZ) twin maternity in twelve is preceded by superfecundation (the fertilization of two ova by sperm from different coitions). Presumably this parameter varies from population to population eg. with coital rates and rates of double ovulation. Sometimes superfecundation occurs by two different men. The frequency with which this occurs must depend on rates of infidelity (promiscuity). It is suggested that among DZ twins born to married white women in the U.S., about one pair in 400 is bipaternal. The incidence may be substantially higher in small selected groups of dizygotic twin maternities, eg. those of women engaged in prostitution.
Your browsing activity is empty.
Activity recording is turned off.
Turn recording back on