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Abstract The aim of the study is to present an updated overview of multifetal pregnancy as well as analyze the data related to multifetal pregnancies in the Department of Obstetrics, Cairo University over the past two and half years including delivery and neonatal outcome. we analyzed the data regarding multifetal pregnancy in the period from 2007 to mid2009 among deliveries that took place in kasr al aini hospital. We introduce an updated review of multifetal pregnancy as we gave a definition of multifetal pregnancy, causes and types , diagnosis , management . Twin fetuses commonly result from fertilization of two separate ova, that is, double-ovum, dizygotic, or fraternal twins. About a third as often, twins arise from a single fertilized ovum that subsequently divides into two similar structures, each with the potential for developing into a separate individual, that is, single-ovum, monozygotic, or identical twins. Either or both processes may be involved in the formation of higher numbers of fetuses. Quadruplets, for example, may arise from one to four ova. Key Words: Definition, causes and types of multiple pregnancy, Diagnosis of multifetal pregnancy, Complications of multifetal pregnancy. |