***TASK***
the task is to simplify the input abstract of a biomedical literature

***INPUT***
the input is the abstract of a biomedical literature

***OUTPUT***
the output is the simplified abstract for the input abstract of a biomedical literature

***DOCUMENTATION***

***EXAMPLES***

Input: We did not identify any new trials from the updated search so the results remain unchanged as follows. We included 13 randomised controlled trials (RCTs) with a total of 1551 women. We found no differences for admission to the neonatal intensive care unit when betamimetics were compared with placebo (risk ratio (RR) 1.28, 95% confidence interval (CI) 0.68 to 2.41; two RCTs of terbutaline with 2600 women) or with magnesium (RR 0.80, 95% CI 0.43 to 1.46; one RCT of 137 women). The rate of preterm birth (less than 37 weeks) showed no significant difference in six RCTs, four comparing ritodrine with placebo/no treatment and two comparing terbutaline with placebo/no treatment (RR 1.11, 95% CI 0.91 to 1.35; 644 women). We observed no differences between betamimetics and placebo, no treatment or other tocolytics for perinatal mortality and morbidity outcomes. Some adverse effects such as tachycardia were more frequent in the betamimetics groups than the groups allocated to placebo, no treatment or another type of tocolytic. Available evidence does not support the use of oral betamimetics for maintenance therapy after threatened preterm labour.
Output:

Oral betamimetics for maintenance therapy after threatened preterm labour do not prevent preterm labour. This conclusion is based on 13 randomised controlled trials with a total of 1551 women. In this review, the betamimetics ritodrine and terbutaline did not reduce the rate of preterm birth (eight trials), or prevent problems with babies that required admission to the neonatal intensive care unit (two trials), when compared with placebo, no treatment or other tocolytic drugs. Betamimetics may cause pregnant women to have an increased heart rate (palpitations) and rate of breathing, low blood pressure, nausea and vomiting, and high blood sugar concentrations as side effects.