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Control of Pig Reproduction VIII

Control of Pig Reproduction VIII

Control of Prenatal Development

bp0018cpr28 | Control of Prenatal Development | CPR2009

Prenatal programming of postnatal development in the pig

Foxcroft G.R. , Dixon W.T. , Dyck M.K. , Novak S. , Harding J.C.S. , Almeida F.C.R.L.

Studies of low birth weight offspring have a long history in pig science. These pigs have reduced growth potential and poor carcass quality compared to their higher birth weight littermates. In contemporary commercial sows with between 10 and 15 total pigs born/litter, between-litter differences in average birth weight appear to make the largest contribution to variation in postnatal growth performance, independent of numbers born. Low birth weight is a characteristic of...

bp0018cpr29 | Control of Prenatal Development | CPR2009

Cellular and molecular events in early and mid gestation porcine implantation sites: a review

Croy B.A. , Wessels J.M. , Linton N.F. , van den Heuvel M. , Edwards A.K. , Tayade C.

Commercial, North American pork breeds (Sus sada) experience significant loss of genetically-normal conceptuses during the peri-implantation (attachment) period and at mid-gestation (day 50 to 90 of the 114 day porcine gestation interval). Although exact causes for these losses are not defined, asynchronous in-utero development and deficits in vascularization of the endometrium and placenta appear to be involved. Understanding of normal maternal-fetal dialogue is critica...

bp0018cpr30 | Control of Prenatal Development | CPR2009

Functional genomic approaches for the study of fetal/placental development in swine with special emphasis on imprinted genes

Bischoff S.R. , Tsai S. , Hardison N. , Motsinger-Reift A.A. , Freking B.A. , Piedrahita J.A.

This chapter describes the application of functional genomic approaches to the study of imprinted genes in swine. While there are varied definitions of "functional genomics", in general they focus on the application of DNA microarrays, single nucleotide polymorphism (SNP) arrays, and other high coverage genomic analyses, and their combination with downstream methods of gene modification such as silencing RNA (siRNA) and viral and non-viral transfection. Between the initi...

bp0018cpr31 | Control of Prenatal Development | CPR2009

Development of the pig placenta*

Vallet J.L. , Miles J.R. , Freking B.A. ,

Placental insufficiency results in fetal loss, low birth weight, stillbirth, preweaning mortality and poor growth. Placental development begins at conceptus elongation, which is a primary factor controlling the size of the placenta. After elongation, the allantois develops outward from the embryo to establish the al lantochorion, which defines the size of the functional placenta. During implantation, chorionic trophoblasts adhere to endometrial epithelial cells. Placenta...