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  2. Sexual activity during pregnancy - Wikipedia

    en.wikipedia.org/wiki/Sexual_activity_during...

    Sex during pregnancy is a low-risk behaviour except when the physician advises that sexual intercourse be avoided, because it may, in some pregnancies, lead to serious pregnancy complications or health issues such as a high-risk for premature labour or a ruptured uterus. [citation needed] Such a decision may be based upon a history of ...

  3. Orbital period - Wikipedia

    en.wikipedia.org/wiki/Orbital_period

    Orbit insertion. v. t. e. The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object. In astronomy, it usually applies to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.

  4. Body mass index - Wikipedia

    en.wikipedia.org/wiki/Body_mass_index

    v. t. e. Body mass index ( BMI) is a value derived from the mass ( weight) and height of a person. The BMI is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m 2, resulting from mass in kilograms (kg) and height in metres (m). The BMI may be determined first by measuring its components by means ...

  5. Small for gestational age - Wikipedia

    en.wikipedia.org/wiki/Small_for_gestational_age

    Pediatrics. Small for gestational age ( SGA) newborns are those who are smaller in size than normal for the gestational age. SGA is most commonly defined as a weight below the 10th percentile for the gestational age. [1] SGA predicts susceptibility to hypoglycemia, hypothermia, and polycythemia. [2] By definition, at least 10% of all newborns ...

  6. Birth control - Wikipedia

    en.wikipedia.org/wiki/Birth_control

    Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent unintended pregnancy. [1] Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. [2] Planning, making available, and using human birth ...

  7. Islamic calendar - Wikipedia

    en.wikipedia.org/wiki/Islamic_calendar

    The Tabular Islamic calendar is a rule-based variation of the Islamic calendar, in which months are worked out by arithmetic rules rather than by observation or astronomical calculation. It has a 30-year cycle with 11 leap years of 355 days and 19 years of 354 days. In the long term, it is accurate to one day in about 2,500 solar years or 2,570 ...

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