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  2. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    Here's the formula to calculate your Estimated Due Date using Naegele's rule : Date of Last Menstrual Period + 7 Days + 9 Calendar Months = Date of Estimated Date of Delivery. Example: LMP = 8 May 2020. +1 year = 8 May 2021. −3 months = 8 February 2021.

  3. East Asian age reckoning - Wikipedia

    en.wikipedia.org/wiki/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 years greater than ages that ...

  4. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    Gestational age. In obstetrics, gestational age is a measure of the age of a pregnancy taken from the beginning of the woman's last menstrual period (LMP), [1] or the corresponding age of the gestation as estimated by a more accurate method, if available. Such methods include adding 14 days to a known duration since fertilization (as is ...

  5. Crown-rump length - Wikipedia

    en.wikipedia.org/wiki/Crown-rump_length

    An ultrasound showing an embryo measured to have a crown-rump length of 1.67 cm and estimated to have a gestational age of 8 weeks and 1 day. Crown-rump length ( CRL) is the measurement of the length of human embryos and fetuses from the top of the head (crown) to the bottom of the buttocks (rump). It is typically determined from ultrasound ...

  6. Preterm birth - Wikipedia

    en.wikipedia.org/wiki/Preterm_birth

    Couples who have tried more than one year versus those who have tried less than one year before achieving a spontaneous conception have an adjusted odds ratio of 1.35 (95% confidence interval 1.22–1.50) of preterm birth.

  7. Date of the birth of Jesus - Wikipedia

    en.wikipedia.org/wiki/Date_of_the_birth_of_Jesus

    The earliest source stating 25 December as the date of birth of Jesus is likely a book by Hippolytus of Rome, written in the early 3rd century. He based his view on the assumption that the conception of Jesus took place at the Spring equinox which Hippolytus placed on 25 March, and then added nine months to calculate the date of birth. That ...

  8. Julian day - Wikipedia

    en.wikipedia.org/wiki/Julian_day

    The Julian date (JD) of any instant is the Julian day number plus the fraction of a day since the preceding noon in Universal Time. Julian dates are expressed as a Julian day number with a decimal fraction added. [8] For example, the Julian Date for 00:30:00.0 UT January 1, 2013, is 2 456 293.520 833. [9]

  9. 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]

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