الفهرس 
AIM OF THE WORKOnly 14 pages are availabe for public view
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Abstract
PTL is defined by the WHO as the onset of labor after the age of viability which is from 20 to 28 weeks of gestation according to the country and before 37 completed weeks or fewer than 259 days since the first day of the woman’s LMP. (1, 2)
About 11% to 12.5% of all deliveries are preterm deliveries, it is associated with a significant increase in fetal mortality and morbidity. About one million neonatal deaths annually are attributed to PTL. (2,12)
Many women have no known risk factors for PTL, about 60% of preterm deliveries are unexplained however those who are labile to PTL should be screened for this risk by fetal fibronectin test, antenatal screening of asymptomatic vaginal infection and ultrasound cervical length measurement. (16, 17)
The main etiology of preterm birth is unknown but subclinical intrauterine infection and inflammation are the paramount of the pathogenesis of preterm birth, So the change of CBC parameters can be used to predict women at risk of threatened preterm labor. (19,20)
This work was designed to study the use of different blood parameters and ratios {lymphocytes, monocytes, neutrophils, and platelets count, and platelets lymphocytes ratio (PLR), neutrophils lymphocytes ratio (NLR), and lymphocytes monocytes ratio (LMR)} in prediction of preterm delivery in women with threatened preterm labor.
It was conducted on 118 patients recruited from Elshatby maternity hospital. group A: 71 patients suffered from PTLP recruited from emergency department, and group B: 47 patients did not suffer from PTLP recruited from antenatal care clinic.
It showed statistically significant correlation between TPTL and the following:
● Small maternal pre-pregnancy weight with a mean 66.20 ± 12.62 kg.
● Short delivery interval equal or less than 2 weeks (about 76.1 % of cases).