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In the book Your Baby’s Sex: Now You Can Choose, David Michael Rorvik and Landrum Brewer Shettles describe methods that couples can use prior to and…
LiteratureSex PreselectionSex PredeterminationFamily PlanningGenderPossums is a 174-page book consisting of a series of essays written about the Virginia opossum (Didelphis virginiana), the only living marsupial in…
LiteratureVirginia opossumEmbryologyMarsupialsNatural historyMary Ware Dennett, an activist in the US for birth control and sex education in the early twentieth century, wrote an educational pamphlet in 1915…
TechnologyGenerative organsSexually Transmitted DiseasesLaborMenstruation