Researchers estimate that over 3 per cent of families at the very least show coupon collection reproductive behaviours. Sex ratio (SR) is the ratio of males to females in a population. The sex ratio is not equal and tends to tip in favour of newborn boys. Researchers originally sought to determine genetic influences on sex ratio (SR), the ratio of males to females in a population. In the fictional world, Mr and Mrs Weasley in the Harry Potter novels had a severe case of coupon collection, despite their financial difficulties.

Source: Daily Mail August 06, 2020 15:02 UTC