منابع مشابه
Time to pregnancy and multiple births.
BACKGROUND Mothers of multiples are alleged to be more fecund than mothers of singletons. Some authors have suggested monitoring twinning rates for assessing temporal changes in a population's reproductive health. METHODS Using a nested case-control design, we estimated the odds of a multiple birth in relation to fecundity in the US Collaborative Perinatal Project inclusive of 8546 pregnant w...
متن کاملTehran Survey of Potential Risk Factors for Multiple Births
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...
متن کاملThe epidemiology of multiple births.
On the basis of MEDLINE and manual searches, we examined the main papers in the English literature regarding risk factors for spontaneous (i.e. not related to fertility drug use) multiple births. The constant frequency of monozygotic (MZ) pregnancies over time and in different geographical areas suggests that the determination of MZ twins is largely unchanged over time, and that a genetic mecha...
متن کاملPerinatal problems in multiple births.
BACKGROUND Multiple pregnancies have become more common in the industrialized world because of rising maternal ages and advances in reproductive medicine. METHODS Selective literature review. RESULTS Multiple pregnancy carries a higher risk of prematurity, intrauterine growth restriction, and prenatal death, as well as elevated risks to the mother including preeclampsia, diabetes, and hemor...
متن کاملTime to pregnancy and pregnancy outcome.
OBJECTIVE To investigate whether the outcome of a pregnancy is related to the time required to achieve that pregnancy (TTP). DESIGN The distribution of the TTP for pregnancies ending in multiple birth, early (before week 12) and late (weeks 12-28) miscarriage, stillbirth, and extrauterine pregnancy was compared to that of pregnancies ending in singleton birth. Furthermore, the distribution of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Human Reproduction
سال: 2006
ISSN: 1460-2350,0268-1161
DOI: 10.1093/humrep/del374