Figure 6
ECM, MRI and gross images of the development of the adrenal glands and gonads in the pig from D20 to D64. Adrenal tissue was first identified at D26 days (A) and can be easily identified at the upper poles of the kidneys at D30 (B) and D35 (C). At D42, the adrenal glands appear well-formed, and their cortex and fetal cortex can be identified (D). Possible gonadal ridges were identified at D20 near the liver (E). Between D26 and D30 the gonads appear to elongate in the caudal direction (F and G). At D35 and D42 the gonads are still located within the abdomen (H, I). By D64 the testes have migrated to the scrotal area as seen by MRI (J) and gross dissection (K), and the ovaries and uterine tubes (L) and the uterus (M) are also identified by gross dissection. Ad-adrenal glands, MES-Mesonephros, Kid-Kidney, MET-Metanephros, Stm-Stomach, GD-Gonads, Tes-Testis, ss-Scrotal sac, Pen-Penis, OV-Ovary, UT-uterine tube, UB-Urinary bladder, UTER-Uterus.
