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  2. Lunisolar calendar - Wikipedia

    en.wikipedia.org/wiki/Lunisolar_calendar

    Lunisolar calendar. A lunisolar calendar is a calendar in many cultures, incorporating lunar calendars and solar calendars. The date of lunisolar calendars therefore indicates both the Moon phase and the time of the solar year, that is the position of the Sun in the Earth's sky. If the sidereal year (such as in a sidereal solar calendar) is ...

  3. Lunar calendar - Wikipedia

    en.wikipedia.org/wiki/Lunar_calendar

    A lunar calendar is a calendar based on the monthly cycles of the Moon 's phases ( synodic months, lunations ), in contrast to solar calendars, whose annual cycles are based on the solar year. The most widely observed purely lunar calendar is the Islamic calendar. [a] A purely lunar calendar is distinguished from a lunisolar calendar, whose ...

  4. Anomaly scan - Wikipedia

    en.wikipedia.org/wiki/Anomaly_scan

    The anomaly scan, also sometimes called the anatomy scan, 20-week ultrasound, or level 2 ultrasound, evaluates anatomic structures of the fetus, placenta, and maternal pelvic organs. This scan is an important and common component of routine prenatal care. [1] The function of the ultrasound is to measure the fetus so that growth abnormalities ...

  5. Tabular Islamic calendar - Wikipedia

    en.wikipedia.org/wiki/Tabular_Islamic_calendar

    Tabular Islamic calendars based on an 8-year cycle (with 2, 5 and 8 as leap years) were also used in the Ottoman Empire and in South-East Asia. [4] The cycle contains 96 months in 2835 days, giving a mean month length of 29.53125 days, or 29d 12h 45m. Though less accurate than the tabular calendars based on a 30-year cycle, it was popular due ...

  6. Gestational sac - Wikipedia

    en.wikipedia.org/wiki/Gestational_sac

    Gestational sac. Contents in the cavity of the uterus seen at approximately 5 weeks of gestational age by obstetric ultrasonography. Artificially colored, showing gestational sac, yolk sac and embryo (measuring 3 mm as the distance between the + signs). The gestational sac is the large cavity of fluid surrounding the embryo.

  7. Lina Medina - Wikipedia

    en.wikipedia.org/wiki/Lina_Medina

    Lina Marcela Medina de Jurado ( Spanish pronunciation: [ˈlina meˈðina]; born 23 September 1933) [1] is a Peruvian woman who became the youngest confirmed mother in history when she gave birth to son Gerardo on 14 May 1939, aged five years, seven months, and 21 days. [1] [2] Based on the medical assessments of her pregnancy, she was less than ...

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