There are currently no official recommendations for weight gain during pregnancy in the UK. For women with a healthy pre-pregnancy weight, an average weight gain of 12 kg (range 10-14 kg) has been shown to be associated with the lowest risk of complications during pregnancy and labour, and with a reduced risk of having a low birthweight (LBW) infant. However, in practice, well-nourished women with a normal pre-pregnancy bodyweight show wide variations in weight gain during pregnancy