dumb-mum syndrome
n.— «According to some preliminary research, women who are pregnant with boys may be less plagued with forgetfulness—sometimes referred to as “dumb-mum syndrome”—then those who are carrying girls.» —“Sex of fetus may determine ‘dumb-mum’ syndrome” CTV.ca (Can.) May 15, 2005. (source: Double-Tongued Dictionary)
Further reading
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There are eight major planets, but more than a million minor ones, including asteroids. If you discover one, you get the honor of naming it. The Dictionary of Minor Planet Names includes minor planets named for rock bands, jazz musicians, poets, and...