Suparno, Amalia Ulfah, Uki Retno Budihastuti, and Bhisma Murti. 2021. “Meta-Analysis: The Effect of Anxiety During Pregnancy on the Risk of Premature Birth and Low Birth Weight in Infants”. Journal of Maternal and Child Health 6 (5):580-91. https://www.thejmch.com/index.php/thejmch/article/view/679.