Paula-Lopes, F.F., de Moraes, A.A., Edwards, J.L., Justice, J.E., and Hansen, P.J. (1998).
 Regulation of preimplantation development of bovine embryos by interleukin-lbeta. Biol.
 Reprod. 59, 1406-1412.

Peters, A.R., Martinez, T.A., and Cook, A.J. (2000). A meta-analysis of studies of the effect of
 GnRH 11-14 days after insemination on pregnancy rates in cattle. Theriogenology. 54,
 1317-1326.

Pinto, A.B., Schlein, A.L., and Moley, K.H. (2002). Preimplantation exposure to high insulin-
 like growth factor I concentrations results in increased resorption rates in vivo. Hum.
 Reprod. 17, 457-462.

Pollard, J.W., and Leibo, S.P. (1993). Comparative cryobiology of in vitro and in vivo derived
 bovine embryos. Theriogenology. 39, 287 (abstract).

Prelle, K., Stojkovic, M., Boxhammer, K., Motlik, J., Ewald, D., Arnold, G.J., and Wolf, E.
 (2001). Insulin-like growth factor I (IGF-I) and long R(3)IGF-I differently affect
 development and messenger ribonucleic acid abundance for IGF-binding proteins and type
 I IGF receptors in in vitro produced bovine embryos. Endocrinology. 142, 1309-1316.

Pursley, J.R., Kosorok, M.R., and Wiltbank, M.C. (1997). Reproductive management of lactating
 dairy cows using synchronization of ovulation. J. Dairy Sci. 80, 301-306.

Pushpakumara, P.G., Robinson, R.S., Demmers, K.J., Mann, G.E., Sinclair, K.D., Webb, R., and
 Wathes, D.C. (2002). Expression of the insulin-like growth factor (IGF) system in the
 bovine oviduct at oestrus and during early pregnancy. Reproduction. 123, 859-868.

Putney, D.J., Drost, M., and Thatcher, W.W. (1989). Influence of summer heat stress on
 pregnancy rates of lactating dairy cattle following embryo transfer or artificial
 insemination. Theriogenology. 31, 765-78.

Putney, D.J., Gross, T.S., and Thatcher, W.W. (1988). Prostaglandin secretion by endometrium
 of pregnant and cyclic cattle at day 17 after oestrus in response to in-vitro heat stress. J.
 Reprod. Fertil. 84, 475-483.

Renard, J.P., Philippon, A., and Menezo, Y. (1980). In-vitro uptake of glucose by bovine
 blastocysts. J. Reprod. Fertil. 58, 161-164.

Rettmer, I., Stevenson, J.S., and Corah, L.R. (1992). Endocrine responses and ovarian changes in
 inseminated dairy heifers after an injection of a GnRH agonist 11 to 13 days after estrus. J.
 Anim. Sci. 70, 508-157.

Rexroad, Jr., C.E., and Powell, A.M. (1999) The ovine uterus as a host for in vitro-produced
 bovine embryos. Theriogenology. 52, 351-364.