Background The incidence of multiple pregnancies has increasing worldwide and it is related to concern in the health care system. This study was aimed to determine the frequencyof multiple pregnancies, and to identify factors affecting the frequency of the phenomena in Tehran, Iran. MaterialsAndMethods In this cross sectional study, 5170 mothers in labor between July 6 to 21 2015 referred to 10...

the rate of multiple pregnancy has dramatically increased during the past decades, along with the diffusion of assisted reproduction technology (art). multiple pregnancy entail an increased risk of, at times life threatening, maternal complications i.e. pre-eclampsia, eclampsia or abruptio placenta, of serious neonatal hazards, i.e. extreme prematurity or growth retardation, as well as deleteri...

The rate of multiple pregnancy has dramatically increased during the past decades, along with the diffusion of assisted reproduction technology (ART). Multiple pregnancy entail an increased risk of, at times life threatening, maternal complications i.e. pre-eclampsia, eclampsia or abruptio placenta, of serious neonatal hazards, i.e. extreme prematurity or growth retardation, as well as deleteri...

assessment of embryo quality in order to choose the embryos that most likely result in pregnancy is the critical goal in assisted reproductive technologies (art). the current trend in human in vitro fertilization/embryo transfer (ivf/et) protocols is to decrease the rate of multiple pregnancies after multiple embryo transfer with maintaining the pregnancy rate at admissible levels (according to...

Background One of the important complications of assisted reproductive technologies is multiple pregnancy, the aim of the present study was to indentify the risk factors of multiple pregnancy independent of number of transfred embryos. MaterialsAndMethods This retrospective study reviewed the medical records of patients underwent intracytoplasmic sperm injection (ICSI) cycle in Royan Institute ...

during assisted reproductive technology (art) procedures, the transfer of a single embryo dramatically reduces the rate of multiple pregnancy. proper information, therefore, should be delivered to patients before embryo transfer. in many countries, regulations limit, according to age of the patient, the number of embryos to be transferred. selective fetal reduction should not be considered as a...

BACKGROUND We aimed to assess the validity of a theoretical mathematical model to predict the pregnancy rate and the multiple pregnancy rate in IVF/oocyte donation programmes on the basis of the implantation rate and the number of transferred embryos. METHODS A total of 1835 embryo transfers corresponding to three different programmes in two centres with different implantation rates were anal...

The purpose of the present study was to examine the effect of single embryo transfer (SET) in assisted reproductive technology (ART) on the reduction of the multiple pregnancy rate. We also estimated the monozygotic (MZ) twinning rates according to the SET diffusion indirectly. A reverse sigmoid curve was assumed and examined using nationwide data of SET from 2007 to 2009 in Japan. The multiple...