ObstetricsA manual for students and practitioners . ghs are but slightly flexed and the legs completely constitute knee presentations. (3) The lower limbs are completelyextended : these are the so-called footling presentations. (4) Very rarelyit happens that one leg is flexed, the other remaining completely ex-tended. The mechanism is exactly the same, no matter how the pelvicextremity presents. State the frequency and causes of pelvic presentations. At full term about 1 labor out of every 60 is breech. In prematurelabors pelvic presentations are much more freciuent, averaging nearly
ObstetricsA manual for students and practitioners . ghs are but slightly flexed and the legs completely constitute knee presentations. (3) The lower limbs are completelyextended : these are the so-called footling presentations. (4) Very rarelyit happens that one leg is flexed, the other remaining completely ex-tended. The mechanism is exactly the same, no matter how the pelvicextremity presents. State the frequency and causes of pelvic presentations. At full term about 1 labor out of every 60 is breech. In prematurelabors pelvic presentations are much more freciuent, averaging nearly 1in 20 labors. One of the most frequent causes of pelvic presentations is prematuredelivery. Among other causes may be mentioned an excessive amount 102 UNNATURAL LABORS. of liquor amnii, a verj^ large uterus, a small child, a hj^drocephalic child,placenta pr^evia. and all forms of pelvic deformities. How many positions are met with in pelvic presentations? Four. 1st. Left Sacro-anterior (L. S. A.).—The back of the child points Fig. 21. Fig.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectobstetrics, bookyear1
