A wheelwright is  a craftsman who builds or repairs wooden wheels. The word is the combination of wheel and the archaic word wright, which comes from the Old English word wryhta, meaning a worker or maker.
It is advisable not to eat mercury-rich fish such as these during pregnancy.. Look out for fish that taste especially metallic, a sign of high mercury levels. Medium-mercury fish include Chilean sea bass, grouper, cod, Mahi Mahi, monkfish, and snapper. Low-mercury fish are the safest for pregnant women.
Try to eat two portions of fish a week, one of which should be oily fish such as salmon, sardines or mackerel. Find out about the health benefits of fish and shellfish. There are some types of fish you should avoid in pregnancy. For more information, see Foods to avoid in pregnancy.