TY - CPAPER AU - Roy N. Kirkwood, DVM, PhD; Frank X. Aherne, PhD; Patrick G. Monaghan; S. Christopher Misutka, DVM TI - Breeding gilts at natural or a hormone-induced estrus: Effects on performance over four parities T2 - Journal of Swine Health and Production DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 2000 DA - 2000/01/01 L1 - https://www.aasv.org/library/swineinfo/Content/SHAP/2000/v8n4p177.pdf ER -