Theses and Dissertations

Issuing Body

Mississippi State University


Larson, Jamie E.

Committee Member

Stone, Amanda E.

Committee Member

Lemley, Caleb O.

Date of Degree


Document Type

Graduate Thesis - Open Access


Agriculture (Animal Science)

Degree Name

Master of Science


College of Agriculture and Life Sciences


Department of Animal and Dairy Sciences


In previous research, progesterone has been supplemented using various techniques, at differing time points during peri-insemination in cattle, with conflicting results. Little research has been conducted on the effects of intravaginal delivery of supplemental progesterone following transfer of embryos produced in vitro, and no research was found to investigate this method exclusively in the period post-transfer. Pregnancy rates following the transfer of embryos produced in vitro are considered less than ideal, especially if these embryos have been cryopreserved. Embryos produced in vitro are less equipped to handle the freezing process due to alternative ultrastructural differences, and display lesser developmental potential in the post-transfer environment compared to embryos derived in vivo. The objective of this study was to evaluate the effect of a CIDR insert following the transfer of IVP embryos on pregnancy rates and circulating concentrations of progesterone of dairy heifer recipients.