STUDY QUESTION: Is there an association between fertility status, method of conception and the risks of birth defects and childhood cancer? SUMMARY ANSWER: The risk of childhood cancer had two independent components: (i) method of concepti…
BACKGROUND: Hydroxychloroquine is a treatment for rheumatic disease and considered safe during pregnancy. Interest in hydroxychloroquine has increased as it is being examined as a potential treatment and prophylaxis for coronavirus disease …
PURPOSE: Excess embryos transferred (ET) (> plurality at birth) and fetal heartbeats (FHB) at 6 weeks' gestation are associated with reductions in birthweight and gestation, but prior studies have been limited by small sample sizes and limi…
STUDY QUESTION: What is the association between ART conception and treatment parameters and the risk of birth defects? SUMMARY ANSWER: Compared to naturally conceived singleton infants, the risk of a major nonchromosomal defect among ART s…