منابع مشابه
Time 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 کاملHandedness, Time Use and Early Childhood Development
Handedness, Time Use and Early Childhood Development We test if there is a differential in early child development by handedness, using a comprehensive range of measures covering, learning, social, cognitive and language skills, evaluated by both interviewer conducted tests and teacher assessments. We find robust evidence that left-handed children do significantly worse in nearly all measures o...
متن کاملTime To Pregnancy and occupational lead exposure.
BACKGROUND Lead exposure is known to be harmful to the male reproductive system, including impairment of fertility. However, it is unclear whether currently existing low levels of exposure have this effect. AIMS To study retrospectively current workers in lead using industries (battery manufacture, smelting, etc), and in non-lead using control industries, in four European countries, with Time...
متن کاملTime 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 کاملAge of menarche and time to pregnancy.
STUDY QUESTION Is age of menarche (AOM) associated with subfecundity and/or infertility in adulthood? STUDY ANSWER A late onset of menarche was associated with a slightly increased risk of subfecundity and infertility. WHAT IS KNOWN ALREADY Abnormal age at onset of menarche is a risk factor for several diseases later in life, but the effect on infertility is unknown. STUDY DESIGN, SIZE AN...
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ژورنال
عنوان ژورنال: Epidemiology
سال: 2009
ISSN: 1044-3983
DOI: 10.1097/ede.0b013e31818b47d1