During pregnancy, poor diets lacking in key nutrients – like iodine, iron, folate, calcium and zinc – can cause anaemia, pre-eclampsia, haemorrhage and death in mothers. They can also lead to stillbirth, low birthweight, wasting and developmental delays for children. Maternal obesity increases the risk of a woman developing gestational diabetes or going into preterm labor, as well as the risk of obesity and diabetes in the child. Recent studies have also linked a woman's pre-pregnancy weight to her child's risk of asthma.