9-cis-retinoic acid during in vitro maturation improves development of the bovine oocyte and increases midkine but not IGF-I expression in cumulus-granulosa cells

1. Gómez, E.
2. Royo, L.-J.
3. Duque, P.
4. Carneiro, G.
5. Hidalgo, C.
6. Goyache, F.
7. Lorenzo, P.L.
8. Alvarez, I.
9. Facal, N.
10. Díez, C.