… However, the true extent of the problem is difficult to accurately estimate because of … trials
or interventions that include control groups are difficult to introduce (55). Another difficulty in …

… Consequently, translating the current level of knowledge into clinical recommendations has
been challenging. A consensus on “target” 25-OHD levels in pregnancy is lacking, and the …

… However, it also compels us to consider earlier influences in a child’s life that have not been
… As such, it was difficult to draw conclusions regarding the impact of chronic distress on …

… Randomized, controlled trials that involve surgery are especially difficult to perform. We …
requirements, and patient follow-up are difficult to attain. Certain standards 34 for sample size …

… Multiparous women may have had a previous challenging breastfeeding experience and …
breastfeeding, women who have had difficult breastfeeding experiences with prior births may …

… The principal investigator of the All Our Families Study is Dr Tough. Research support was
provided by the Alberta Children’s Hospital Foundation and the Canada Research Chairs …

Objective To assess the separate and combined associations of maternal pre‐pregnancy
body mass index (BMI) and gestational weight gain with the risks of pregnancy complications …

Background Parents have faced substantial social and economic challenges during the
COVID-19 pandemic. Preliminary cross-sectional research has demonstrated increases in …

Background Maternal obesity and excessive gestational weight gain may have persistent
effects on offspring fat development. However, it remains unclear whether these effects differ …

… This criterion aligns Definition 2 more closely with what has been used in other studies of
current infertility, but direct comparisons are difficult due to differences in age groups and …