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Immunohistochemical localization of the BMP receptors in the porcine fetal ovary during (a–c) early development (approximately day 46 post-conception (pc)) and (d–f) close to term (approximately day 114 pc). Immunostaining for BMP: (a,d) R-IA; (b,e) R-IB; (c,f) R-II. EN, egg nests; GF, growing follicle; OSE, ovarian surface epithelium; PF, primordial follicle. Scale bars = 100 µm.
