TY - JOUR T1 - Covid-19 variants of concern and pregnancy JF - BMJ Medicine JO - bmjmed DO - 10.1136/bmjmed-2022-000151 VL - 1 IS - 1 SP - e000151 AU - Sarah J Stock AU - Clea Harmer AU - Clara Calvert Y1 - 2022/03/01 UR - http://bmjmedicine.bmj.com/content/1/1/e000151.abstract N2 - ER -