But women who knew the sex of their unborn baby described the movements of sons and daughters differently. All were ‘active’, but male activity was more likely to be described as ‘vigorous’ and ‘strong’, including what Rothman teasingly describes as ‘the “John Wayne fetus” – “calm but strong”’. Female activity, by contrast, was described in gentler terms: ‘Not violent, not excessively energetic, not terribly active were used for females’.