Saragi DS. RELATIONSHIP OF KNOWLEDGE WITH PREGNANT WOMEN’S ATTITUDE ABOUT CHANGES IN TRIMESTER I PSYCHOLOGY IN THE WORK AREA OF KOTA PINANG PUBLIC HEALTH CENTER, LABUHAN BATU SELATAN REGENCY IN 2021 . midwifery [Internet]. 2022 Jun. 15 [cited 2026 Apr. 17];10(2):1177-86. Available from: https://www.midwifery.iocspublisher.org/index.php/midwifery/article/view/484