Effective dosage of growth differentiation factor‐9β in folliculogenesis and angiogenesis in the sheep ovarian tissues grafted onto chick embryo chorioallantoic membrane. - Vatanparast, Mahboubeh; Moshrefi, Mojgan; Yari, Nahid; Khalili, Mohammad Ali; Macchiarelli, Guido; Palmerini, Maria Grazia (Journal of Obstetrics & Gynaecology Research, 2020)