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J Pediatr. 2009 Jul;155(1):45-50, 50.e1-2. doi: 10.1016/j.jpeds.2009.02.005. Epub 2009 Apr 24.

Long-term neurodevelopment of children exposed to maternal nausea and vomiting of pregnancy and diclectin.

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  • 1Department of Clinical Pharmacology, Hospital for Sick Children, Toronto, Ontario, Canada.



To determine the effects of nausea and vomiting of pregnancy (NVP) and its treatment with diclectin on child neurodevelopment.


An observational cohort study of mother-child pairs ascertained via a pregnancy call-in center was conducted. Three groups of children were studied: 45 with NVP and diclectin, 47 with NVP no diclectin, and 29 with no NVP. Phone calls to mothers during pregnancy and 6 to 9 months after childbirth yielded information on pregnancy, birth, and early child development. Children aged 3 to 7 years received a comprehensive set of psychological tests. Mothers were assessed for IQ and socioeconomic status.


All children scored in the normal range for IQ, with the NVP-exposed group scoring higher than the non-exposed group on Performance IQ (P < .02), NEPSY Verbal Fluency (P < .003) and Phonological Processing (P < .004), and McCarthy Numerical Memory (P < .004). Predictors of enhanced results were NVP severity and maternal IQ.


NVP has an enhancing effect on later child outcome. Diclectin does not appear to adversely affect fetal brain development and can be used to control NVP when clinically indicated.

[PubMed - indexed for MEDLINE]
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