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Labortakes longer in charwoman pregnant with Gemini , a new study shows , indicate that these mother and their doctor could wait a few more hours before opting for caesarean delivery .
Using a home database of labor and bringing information from several clinical centers , the researchers found that twin require about one to three hours more than individual babies to complete the first stage of labor . During this first stage , the cervix opens until it is spacious enough for the infant to pass through ; the 2nd stage of birth is the actualdelivery of the baby .
" Our data supports the suspected findings that labor progression of duplicate gestation is keep up , compared to a singleton gestation period , " said work researcher Dr. Heidi Leftwich , a maternal - fetal medicine fellow at the University of Illinois at Chicago . " Doctors could have twins labor longer before squall it ' failure to progress . ' "
The researcher liken about 900 twin pregnancies with 100,500 singleton pregnancies that serve as controls . [ 9 Conditions That Pregnancy May Bring ]
The investigator measure the meter it took for woman ’s cervixes to expand 1 centimetre as a gauge for toil progression , and adjusted the results for fuddle factors such as weight of the sister , mother ’s age and weighting , and whether this was her first time giving birth .
In twin pregnancy , it took an average of 12.7 hours for the cervix to march on from 4 centimeters to fully dilated , at 10 centimeters . In singleton pregnancies , this took an norm of 9.6 hours .
" Women who are pregnant with counterpart should anticipate that their labor may take longer than if they had a singleton gestation , " Leftwich said .
In deciding whether to recommend acesarean livery , physicians wait at how a woman ’s Labour Party is come along using a putz called the " Friedman toil curve . " The bender shows the modal time it takes for a woman to pass on to 10 cm of cervical dilation and deliver the baby , and allow doc to set whether a patient role is having a normal labor pattern .
This lying-in curve , however , may be outdated . It was devised in the 1950s and experts say it may not be a good estimate for the contemporary universe . Today , both woman and neonate are large on norm compared to past 10 , and more women apply epidurals for pain easement . Suchfactors may affect laborprogression .
Moreover , labor progress in twin gestation period was not address in Friedman ’s original body of work in develop the curve .
The researchers also found twins weigh on average 1.7 pounds ( 800 grams ) less than singleton . woman with Twin weremore often older , and were more likely to deliver preterm . Twin gestation were almost twice as likely to have cesarean births .
It is not entirely known why twin labors take longer . One speculation that an overextended uterus may not function quite as well as it does in a singleton gestation , Leftwich said .
There are other reasons that a hundred - section may be advocate ; for example , one or both twin may be out of position .
" The decision for a cesarean delivery should n’t be only based on the rigid definition of labor advance , " Leftwich enunciate .
