ESDS is now part of the UK Data Service.
These ESDS web pages will remain during the transition, but may not be up to date.
Here are some links to get started with the new service:
The effect of infertility and its treatment on child health and developmentResearch using data from the Millennium Cohort Study
Does premature birth affect a child’s long-term health or development?Research using the Millennium Cohort Study