Effectiveness of educational intervention in improving physical activity and nutritional performance among pregnant women: a pre-post quasi-experimental study using health belief model - Khani Jeihooni, Ali; Razmjouie, Fatemeh; Jormand, Hanieh; Sedghi Jahromi, Fariba; Afzali Harsini, Pooyan; Kamyab, Amirhossein; Ghaleh Golab, Farzaneh (Frontiers in Global Women's Health, 2024)