See the paper here:
Paczolt KA, Jones AG (2010) Post-copulatory sexual selection and sexual conflict in the evolution of male pregnancy. Nature 464:401-404. doi:10.1038/nature08861
The Dark Side of Male Pregnancy
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See the paper here:
Paczolt KA, Jones AG (2010) Post-copulatory sexual selection and sexual conflict in the evolution of male pregnancy. Nature 464:401-404. doi:10.1038/nature08861