Inclusion Criteria:  Children conceived after the mother underwent HSG procedure in the context of the H2Oil trial (2012-2014) Children must be conceived <6 months after the HSG procedure Parents must have given consent for recontacting for follow up research  Exclusion Criteria:  Children conceived after the mother underwent HSG procedure that was not part of the H2Oil trial Children conceived >6 months after the HSG procedure Children whose parents did not give permission to be recontacted for follow up research Children that are not able to comprehend the instructions at the time of assessment Absence or withdrawal of written informed consent Inability to comprehend testing instructions at time of assessment Severe motor disability that interferes with outcome assessment at time of assessment Documented and/or parent-reported diagnosis of a neurological disorder Somatic disorders known to affect the outcome assessments at time of assessment