However, thousands complained that Mass Effect 3 only had three alternative endings, with no significant differences between them.

BBC: Mass Effect 3 row prompts change to add 'further closure'

Several studies have revealed significant differences in psycho-social development between children whose mothers had participated in MOCEP and those who had not.

UNESCO: Family Literacy Programmes (FLPs)

Dr Ron Gray, from Oxford University, who led the research added that although the differences appeared small, they may well be significant and that lower IQ had been shown to be associated with being socially disadvantaged, having poorer health and even dying younger.

BBC: Moderate drinking in pregnancy 'harms IQ'