PT - JOURNAL ARTICLE AU - Sally Graglia AU - Aaron Kornblith TI - How to perform and interpret a first trimester transabdominal point-of-care ultrasound AID - 10.1136/emermed-2019-209421 DP - 2021 May 01 TA - Emergency Medicine Journal PG - 394--397 VI - 38 IP - 5 4099 - http://emj.bmj.com/content/38/5/394.short 4100 - http://emj.bmj.com/content/38/5/394.full SO - Emerg Med J2021 May 01; 38