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Transgenerational effects of in utero heat stress on reproduction in pigs
(University of Missouri--Columbia, 2017)
Seasonal infertility caused by high ambient temperatures and humidity during the summer months can have negative effects on the reproduction of female swine. These conditions may cause heat stress leading to large economic ...
Factors affecting growth of the conceptus in lactating dairy cows and non-lactating dairy heifers
(University of Missouri--Columbia, 2015)
Embryonic loss in dairy cows continues during the fifth and sixth weeks of pregnancy in lactating dairy cows. There is an association between smaller embryos and pregnancy loss during this period. The objective was to ...
Strategic progesterone testing as a method to predict conception and manage reproduction in dairy cows
(University of Missouri--Columbia, 2015)
Timed AI (TAI) programs have increased reproductive efficiency in dairy herds, but conception rates to TAI remain below 50% for most herds. The low TAI pregnancies per AI (P/AI) is partially explained by cows that do not ...
Effect of RU486, a progesterone antagonist, on uterine progesterone receptor, embryonic development and ovarian function during early pregnancy in pigs
(University of Missouri--Columbia, 2009)
Progesterone (P4) down-regulates the progesterone receptor (PGR) exclusively within the epithelium of the pig uterus near d 8 of the estrous cycle and pregnancy. How P4 down-regulates the PGR is not understood but is ...
Characterization of progesterone receptor (PGR) mRNA and protein isoforms in the endometrium of cyclic and pregnant pigs
(University of Missouri--Columbia, 2010)
Disappearance of the progesterone receptor (PGR) from the uterine luminal epithelium (LE) is essential for cyclicity and pregnancy in pigs. In humans, three PGR mRNA isoforms (PGR-A, PGR-B and PGR-C) arise from alternative ...
Efficacy of interferon-stimulated genes and pregnancy-associated glycoproteins for pregnancy diagnosis within an estrus resynchronization protocol for dairy cattle
(University of Missouri--Columbia, 2010)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Reproductive management is a major economic concern in the dairy industry. Long intervals between TAI increases the days open and decrease the 21 day ...
The expression and correlations of repressors, intermediaries, and end-products of the IGF1 and insulin signaling pathways within the hepatic and reproductive tissues of holstein cattle h [electronic resource]
(University of Missouri--Columbia, 2008)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Selection for high milk production has created a physiologically different dairy cow with lower fertility. The growth hormone (GH)/insulin-like growth ...
Effects of heat stress on reproduction and productivity of primiparous sows and their piglets' performance
(University of Missouri--Columbia, 2009)
Heat stress (HS) produces seasonal infertility in sows and decreases reproductive efficiency. Sows were exposed to HS during a production cycle (gestation [gest], lactation [lact], and breeding) to examine productivity. ...
Synchronization and ovarian development in dairy cows and heifers
(University of Missouri--Columbia, 2012)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Reproductive management is an important factor for improving reproductive efficiency in the dairy industry. Reproductive efficiency affects the ...
Effects of heat stress on thermoregulation, reproduction and performance of different parity sows
(University of Missouri--Columbia, 2012)
Heat stress caused by high ambient temperatures causes seasonal infertility in sows, leading to decreased production and a loss in reproductive efficiency. The objective of these studies was to specifically determine the ...