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oai:www.ideals.illinois.edu:2142/20256 2023-07-10 col_2142_5131 col_2142_14771 com_2142_5130 com_2142_685 com_2142_397

Dziuk, Philip J. Chen, Zhaoying 2011-05-07T12:33:50Z 2011-05-07T12:33:50Z 10000-01-01 1992 The effects of initial uterine length per embryo and stage of gestation on embryonic survival, development and sex ratio were determined by systematically restricting embryos to 5, 10, 15, 20, 25, 30, 35, 40, 45 or more than 50 cm of initial uterine length per potential embryo and examining the reproductive tracts at d 17, 23, 29, 35 or 41 of gestation. At d 3 the mean length of a uterine horn was 169 $\pm$ 35 cm with a range of 80 to 255 cm. The mean number of corpora lutea (CL) was 12.4 $\pm$ 2.34 from both ovaries. Ovulation rate was positively correlated with the length of uterine horns (r =.3769). Prenatal survival rate was highly correlated with initial allotted uterine space from 5 to 25 cm/CL (r =.95, p $$.1) and when embryos were restricted to 15 cm to above, sex ratio of male to female was 49:51. Stage of gestation had little effect on sex ratio. Male fetuses occupied more uterine space than females in both crowded and roomy sections (p $<$.05). At d 41 males were lighter than females in crowded sections (male 10.17 gm, female 11.56 gm) but heavier than females in sections with assigned space greater than 25 cm/CL (male 12.91 gm, female 12.05 gm) (p $<$.05). Made available in DSpace on 2011-05-07T12:33:50Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9236422.pdf: 2765281 bytes, checksum: eeeb632e3a860784cb89a283bb0084ff (MD5) Previous issue date: 1992 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:42:40Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:18:35-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9236422 (UMI)AAI9236422 http://hdl.handle.net/2142/20256 eng Copyright 1992 Chen, Zhaoying Biology, Animal Physiology The influence of initial length of uterus per embryo and gestation stage on prenatal survival, development and sex ratio in the pig text Animal Sciences Animal Sciences University of Illinois at Urbana-Champaign Dissertation Ph.D.