Imported supplements are very expensive in HK because of advertisements and extra level of distributorship. You can consider buying it online. One bottle of DHA is less than US$30 and it is good for 1.5 months.
DHA is important throughout pregnancy, particularly in the third trimester when major brain growth occurs. Increasing DHA during pregnancy and nursing significantly enhances the level of DHA available to the foetus and infant. Certain studies (some, but not all) have shown that supplementation of DHA in the mother’s diet improves infant developmental outcomes, such as: