Background: Young maternal age is variously defined in studies of its effect on obstetrics and perinatal outcomes. Also, pregnancy has been reported as the leading cause of death in adolescent girls in low-and middle-income countries. Aims: The aim of the study was to evaluate whether young maternal age was associated with an increased risk of obstetrics and perinatal adverse outcomes. Study Design: Case-control study. Methods: This case-control study was derived from a database of the medical records between January 2008 and December 2012. In the present study, 1374 teenage pregnancy and 1294 adult pregnancy cases were included. After restriction of analyses to singleton primiparous women, 1282 teenage pregnancy and 735 adult pregnancy cases were analyzed. Maternal age was separated into three groups: 15 and less, 16-19, and 20-34 years. Adjusted odds ratios (ORs) were derived through logistic regression models for the potential confounding factors. Results: Adolescents aged 15 years and younger had higher risks of preterm delivery, early preterm delivery, intrauterine fetal death and neonatal death compared with women aged 20 to 34 years after adjustment for confounding factors. In addition, both groups of adolescents had higher risks for anemia and episiotomy and lower risk of cesarean delivery. The rates of preeclampsia, gestational diabetes, chronic diseases, intrauterine growth restriction (IUGR) were higher in the adult group. Adolescent pregnancy is defined as pregnancy in girls aged less than 20 years. It is estimated that 16 million 15-19 yearold women give birth every year, accounting for approximately 11% of all births worldwide (1). In low-and middle-income countries, pregnancy has been reported as the main factor of death in adolescent girls (1). Young maternal age has usually been considered a high risk in relation to adverse pregnancy outcomes (1-16). Possible explanations for adverse pregnancy outcomes have been thought to be their biological immaturity or poor social, economic and behavioral factors such as smoking, alcohol/substance abuse, malnutrition and inadequate prenatal care (17-22). However, the previous studies had conflicting findings regarding whether the effect of young maternal age on adverse pregnancy outcomes were caused by their biological immaturity or poor social, economic and behavioral factors (17)(18)(19)(20)(21)(22). ConclusionThe aim of the present study was to investigate whether there is an association between young maternal age and poor maternal and perinatal outcomes independent of possible confounding factors.

We describe the TÜBİTAK Turkish-English machine translation systems submissions in both directions for the WMT 2016: News Translation Task. We experiment with phrase-based and hierarchical phrase-based systems for both directions using word-level and morpheme-level representations for the Turkish side. Finally we perform system combination which results in 0.5 BLEU increase for Turkishto-English and 0.3 BLEU increase for English-to-Turkish.

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