1. Lucy MC, Thatcher WW, Staples CR. Postpartum function: nutritional and physiological interactions. In: van Horn HH, Wilcox CJ, editors. Large dairy herd management. Management Services, American Dairy Science Association, 301 West Clark Street, Champaign, IL; 1991. p. 135.
2. Characteristics and causes of inadequate corpus luteum;Hunter;J. Reprod. Fertil.,1991
3. Luteal phase deficiency as a possible cause of repeat breeding in dairy cattle;Kimura;Br. Vet. J.,1987
4. Luteal inadequacy during the early luteal phase of sub-fertile cows;Shilton;J. Reprod. Fertil.,1990
5. Reduced fertility associated with low progesterone postbreeding and increased milk urea N2 in lactating cows;Larson;J. Dairy Sci.,1997