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  2. Immaculate Conception - Wikipedia

    en.wikipedia.org/wiki/Immaculate_Conception

    The Immaculate Conception is the belief that the Virgin Mary was free of original sin from the moment of her conception. It is one of the four Marian dogmas of the Catholic Church. [2] Debated by medieval theologians, it was not defined as a dogma until 1854, [3] by Pope Pius IX in the papal bull Ineffabilis Deus . [4]

  3. Billings ovulation method - Wikipedia

    en.wikipedia.org/wiki/Billings_ovulation_method

    The Billings ovulation method is a method in which women use their vaginal mucus to determine their fertility. [3] It does not rely on the presence of ovulation, rather it identifies patterns of potential fertility and obvious infertility within the cycle, whatever its length. Effectiveness, however, is not very clear.

  4. East Asian age reckoning - Wikipedia

    en.wikipedia.org/wiki/East_Asian_age_reckoning

    East Asian age reckoning. Traditional East Asian age reckoning covers a group of related methods for reckoning human ages practiced in the East Asian cultural sphere, where age is the number of calendar years in which a person has been alive; it starts at 1 at birth and increases at each New Year. Ages calculated this way are always 1 or 2 ...

  5. Wikipedia:Age calculation templates - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Age_calculation...

    Age calculation templates. Wikipedia uses several templates that self-update every day to keep date and age information current. These are very useful for a dynamic online encyclopedia and save users from having to regularly update that kind of information. However, when using this kind of template, a few things should be kept in mind.

  6. Logarithm - Wikipedia

    en.wikipedia.org/wiki/Logarithm

    provided that b, x and y are all positive and b ≠ 1.The slide rule, also based on logarithms, allows quick calculations without tables, but at lower precision.The present-day notion of logarithms comes from Leonhard Euler, who connected them to the exponential function in the 18th century, and who also introduced the letter e as the base of natural logarithms.

  7. Gmail - Wikipedia

    en.wikipedia.org/wiki/Gmail

    Gmail is the email service provided by Google. As of 2019, it had 1.5 billion active users worldwide, making it the largest email service in the world. [1] It also provides a webmail interface, accessible through a web browser, and is also accessible through the official mobile application. Google also supports the use of third-party email ...

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