Active Yale MFMU Research Studies
A Randomized Trial of Pessary in Singleton Pregnancies With a Short Cervix (TOPS)
The purpose of the study is to determine whether the Arabin pessary is a useful intervention of preterm birth at less than 37 weeks in women with a singleton gestation and a short cervix.
While cervical length is one of the most powerful predictors of subsequent preterm birth, the best treatment to reduce subsequent preterm birth remains unknown. This study is a randomized trial of women who have a singleton pregnancy and a short cervical length on transvaginal ultrasound as determined by a study-certified sonographer. It is being conducted at 12 clinical centers across the country and the recruitment target is enrollment of 850 pregnant women. Participants will be randomized to 1) Arabin pessary or 2) usual care as per by local hospital protocol. Pessary is a promising low-cost, non-surgical intervention that appears to be well-tolerated. The pessary will be placed by obstetric providers trained in appropriate placement of the Arabin pessary.
Yale HIC#: 2000025002
A Trial of Pessary and Progesterone for Preterm Prevention in Twin Gestation With a Short Cervix (PROSPECT)
This protocol outlines a randomized trial of 630 women evaluating the use of micronized vaginal progesterone or pessary versus control (placebo) to prevent early preterm birth in women carrying twins and with a cervical length of less than 30 millimeters.
Multiple gestation increases the risk of preterm delivery. Babies born preterm have increased rates of neonatal mortality and long-term neurodevelopmental morbidities. Short cervical length is known to be an important risk factor for spontaneous preterm birth and to occur more frequently in women with a twin gestation. Although there is no evidence that progesterone reduces the risk of preterm birth in multifetal gestation, there is evidence that progesterone reduces the risk of prematurity in singleton gestations complicated with a short cervix. The Arabin pessary has also been shown to reduce the risk of preterm birth among singletons with a short cervix, and in a secondary subgroup analysis of a recent study of the use of pessary in multiple gestations, women with a cervical length < 25th percentile had a significantly reduced risk of the primary composite neonatal adverse outcome. Secondary analysis of studies of vaginal progesterone in multiple gestation with a short cervix also suggest a possible beneficial effect on preterm delivery.
Yale HIC#: 2000024771
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