Influence of Sexual Maturity of Donor on in Vivo Survival of Transferred Porcine Embryos1
| Autor: | R R Maurer, D. C. England, F Stormshak, Anthony E. Archibong |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Estrous cycle
endocrine system medicine.medical_specialty animal structures urogenital system Radioimmunoassay Embryo Cell Biology General Medicine Biology Embryo transfer Endocrinology Reproductive Medicine Internal medicine Jugular vein medicine Gestation Sexual maturity Ampulla reproductive and urinary physiology hormones hormone substitutes and hormone antagonists |
| Zdroj: | Biology of Reproduction. 47:1026-1030 |
| ISSN: | 1529-7268 0006-3363 |
| Popis: | A study was conducted to determine whether embryos recovered from first-estrous (pubertal) and second-estrous gilts differed in survival when transferred to first- or third-estrous recipients. Embryos were recovered surgically from first- and second-estrous donors 48-72 h postmating and 6-10 normal embryos/zygotes (1-4 cells) were transferred to oviducts (3-5 embryos/ampulla) of nonmated synchronous first- (n = 40) or third- (n = 15) estrous recipients. Blood samples were collected from the jugular vein of recipient gilts on Days 3, 12, and 30 of gestation and the sera were analyzed for progesterone and free (unconjugated) estrogens by use of radioimmunoassays. Recipient gilts were subsequently slaughtered between Days 30 and 40 to assess embryonic losses. Mean number of ovulations was lower among first-estrous vs. third-estrous recipients (8.9 +/- 0.7 vs. 11.4 +/- 0.7; p 0.05).(ABSTRACT TRUNCATED AT 250 WORDS) |
| Databáze: | OpenAIRE |
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