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  2. Age and female fertility - Wikipedia

    en.wikipedia.org/wiki/Age_and_female_fertility

    The average age of a girl's first period is 12 to 13 (12.5 years in the United States, [6] 12.72 in Canada, [7] 12.9 in the UK [8]) but, in postmenarchal girls, about 80% of the cycles are anovulatory in the first year after menarche, which declines to 50% in the third year, and to 10% by the sixth. [9]

  3. Female infertility - Wikipedia

    en.wikipedia.org/wiki/Female_infertility

    The average age of a girl's first period is 12–13 (12.5 years in the United States, [4] 12.72 in Canada, [5] 12.9 in the UK [6]), but, in postmenarchal girls, about 80% of the cycles are anovulatory in the first year after menarche, 50% in the third and 10% in the sixth year. [7]

  4. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    In Europe, the average childbearing age has been rising continuously for some time. In Western, Northern, and Southern Europe, first-time mothers are on average 26 to 29 years old, up from 23 to 25 years at the start of the 1970s. In a number of European countries (Spain), the mean age of women at first childbirth has crossed the 30-year threshold.

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  6. Purity test - Wikipedia

    en.wikipedia.org/wiki/Purity_test

    Most purity tests have possible scores anywhere from 0% to 100%. Purity tests ask numerous personal questions of their users, most commonly about the use of alcohol and illicit substances; sexual acts with members of the opposite or same-sex; other illicit or illegal activities, and the above actions in an odd or "kinky" context.

  7. Gender identity - Wikipedia

    en.wikipedia.org/wiki/Gender_identity

    The terms gender identity and core gender identity were first used with their current meaning—one's personal experience of one's own gender [1] [16] —sometime in the 1960s. [ 85 ] [ 86 ] To this day they are usually used in that sense, [ 8 ] though a few scholars additionally use the term to refer to the sexual orientation and sexual ...

  8. JetPunk - Wikipedia

    en.wikipedia.org/wiki/JetPunk

    JetPunk is an online trivia and quizzing website. The service offers a variety of quizzes in different topics, such as geography, history, science, literature, and music. [2] [3] The site offers quizzes in a variety of languages, including but not limited to: English, French, Spanish, Dutch, Italian, German, Finnish, Portuguese, and Polish. [4]

  9. DNA paternity testing - Wikipedia

    en.wikipedia.org/wiki/DNA_paternity_testing

    The first form of any kind of parental testing was blood typing, or matching blood types between the child and alleged parent, which became available in the 1920s, after scientists recognized that blood types, which had been discovered in the early 1900s, were genetically inherited. Under this form of testing, the blood types of the child and ...