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A pregnant woman receives a covid-19 shot in Tel Aviv, Israel

Jack Guez/AFP via Getty Images

AS GLOBAL vaccination against covid-19 ramps up, women who are pregnant, breastfeeding or trying to conceive have been left uncertain as to whether they should join in.

Advice has been slow to develop, and is often contradictory. Initially, the UK’s Joint Committee on Vaccination and Immunisation said people shouldn’t get a coronavirus vaccination if they were pregnant or planning to conceive in the next three months. But the committee now says pregnant women who are likely to be exposed to the coronavirus because …