Pourahmad Z, Namavar Jahromi B, Koushkie Jahromi M. Can Physical Activity Patterns before and during Pregnancy and Anxiety be Related to Preterm Birth?. Adv Nurs Midwifery [Internet]. 2022 Jul. 15 [cited 2024 May 17];31(3):24-31. Available from: https://journals.sbmu.ac.ir/en-jnm/article/view/39129