background and aims: nowadays, orofacial clefts are known as the most common orofacial birth defects. several factors are responsible for problem, such as environmental factors, genetic background, nutritional deficiencies such as vitamins, zinc, iron, maternal diseases, exposure to teratogenicagents, smoking, drugs, organic solvents. the aim of this study was to evaluate the of risk factors fr...

background: to determine the prevalence and characteristics of birth defects in perinatal infants in hubei province during 200l-2008. methods: the prevalence of birth defects in perinatal infants delivered after 28 weeks or more was analyzed in hubei surveillance hospitals during 200l-2008. results: the incidence of birth defects in perinatal infants from 200l to 2008 was 120.0 per 10,000 birth...

Background: In the past 22 years, intracytoplasmic sperm injection (ICSI) on human oocytes become a successful method of treatment for most categories of infertility. But there are real concerns that possible malformations among ICSI infants are still not fully recognized. Despite the success of ICSI, the risk of major birth defects due to various parental factors or treatment may increase. We ...

background: assisted reproductive technologies (art) are known as a treatment for infertility in which oocyte undergoes manipulation outside body. the aim of this study was to study the evaluation of birth defects in infants conceived through assisted reproductive technologies (art) and compare them with naturally-conceived infants. materials and methods: in this retrospective study, four hundr...

Background and Objective: Regional differences exist in the prevalence of birth defects. This study was undertaken to determine the prevalence and related factors with birth defects in Zanjan, Iran. Material and Methods: This descriptive analytic study was performed in Zanjan province during 2015–2016. Data included 41265 child births, which were extracted from the Iranian Mother and Newborn (...