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  2. Ballard Maturational Assessment - Wikipedia

    en.wikipedia.org/wiki/Ballard_Maturational...

    The New Ballard Score allows scores of −1 for the criteria, hence making negative scores possible. The possible scores then range from −10 to 50, the gestational range extending up to 20 weeks. (A simple formula to come directly to the age from the Ballard Score is Age=((2*score)+120)) / 5. Maturity Rating:

  3. Bishop score - Wikipedia

    en.wikipedia.org/wiki/Bishop_score

    According to the Modified Bishop's pre-induction cervical scoring system, effacement has been replaced by cervical length in cm, with scores as follows: 0 for >3 cm, 1 for >2 cm, 2 for >1 cm, 3 for >0 cm. [6] Cervical length may be easier and more accurate to measure and have less inter-examiner variability.

  4. Calendar-based contraceptive methods - Wikipedia

    en.wikipedia.org/wiki/Calendar-based...

    When used to avoid pregnancy, the standard days method has been estimated [22] to have perfect-use efficacy of 95% and typical-use efficacy of 88%. [ 20 ] [ 21 ] These figures are based on a 2002 study in Bolivia, Peru, and the Philippines of women of reproductive age having menstrual cycles between 26 and 32 days, [ 20 ] [ 23 ] : 505 and on a ...

  5. Montevideo units - Wikipedia

    en.wikipedia.org/wiki/Montevideo_units

    during the 10 minute period of measurement 3 contractions occurred; subtract the resting tone from the peak intensity of the contraction; add the 3 contractions together to get the MVUs; Montevideo units are calculated by obtaining the peak uterine pressure amplitude and subtracting the resting tone.

  6. Pearl Index - Wikipedia

    en.wikipedia.org/wiki/Pearl_Index

    The Pearl Index, also called the Pearl rate, is the most common technique used in clinical trials for reporting the effectiveness of a birth control method. It is a very approximate measure of the number of unintended pregnancies in 100 woman-years of exposure that is simple to calculate, but has a number of methodological deficiencies.

  7. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    The estimated date of delivery (EDD), also known as expected date of confinement, [1] and estimated due date or simply due date, is a term describing the estimated delivery date for a pregnant woman. [2] Normal pregnancies last between 38 and 42 weeks. [3] Children are delivered on their expected due date about 4% of the time. [4]

  8. Ziegler–Nichols method - Wikipedia

    en.wikipedia.org/wiki/Ziegler–Nichols_method

    The Ziegler–Nichols tuning (represented by the 'Classic PID' equations in the table above) creates a "quarter wave decay". This is an acceptable result for some purposes, but not optimal for all applications. This tuning rule is meant to give PID loops best disturbance rejection. [2]

  9. Smith predictor - Wikipedia

    en.wikipedia.org/wiki/Smith_predictor

    To check that this works, a re-arrangement can be made as follows: Here we can see that if the model used in the controller, G ^ ( z ) z − k {\displaystyle {\hat {G}}(z)z^{-k}} , matches the plant G ( z ) z − k {\displaystyle G(z)z^{-k}} perfectly, then the outer and middle feedback loops cancel each other, and the controller generates the ...