Total uterine impulse and cervical resistance at parturition.
Resistance to the passage of the fetus during parturition has been estimated indirectly by calculation of the active contraction area during the first stage of labor until the cervix reaches a dilatation of 5 cm--the period of cervical resistance. Parturients with a high total uterine impulse in this period were studied. Two different patterns of cervical resistance with corresponding clinical pictures were found. Type I had a high frequency of cesarean sections with a good correlation to the resistance. With high resistance there also was a tendency to low Apgar scores at 1 minute. Type II had normal 1 minute Apgar scores and only vaginal deliveries.
D001034:Apgar Score; D002584:Cervix Uteri / Q000502:physiology*; D002585:Cesarean Section; D036861:Delivery, Obstetric / Q000379:methods; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D011247:Pregnancy; D013997:Time Factors; D014590:Uterine Contraction