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Synchronized Induction of Pubertal Estrus in Gilts with Gonadotropins and Prostaglandin F 2 α Analogs: Clinical Observation.
Author(s) -
Nagy A.,
Szurop I.,
Jöchle W.
Publication year - 1986
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/j.1439-0531.1986.tb01222.x
Subject(s) - boar , litter , estrous cycle , artificial insemination , prostaglandin f , zoology , insemination , estrus synchronization , prostaglandin , biology , endocrinology , medicine , hormone , andrology , ovulation , pregnancy , semen , genetics , agronomy
Contents Clinical field observations on more than 7 500 pubertal gilts from four breeds and several locations, but under similar management, are reported. Standard procedures with pubertal gilts (grouping, special diets, boar exposure) did not bring sufficient numbers of gilts into heat within the first 6 days after grouping for efficient use of artificial insemination. Adding treatment with PMSG/hCG on day one of grouping, doubled the percentage of gilts in heat by day 6, from 25–30% to 57–60%. Treatment on day 1 with the PGF analogs alfaprostol or Enzaprost, followed by PMSG/hCG on day 5, increased the percentage of gilts in heat from 10–15% during the first 5 days to 75–80% between days 6 and 10. Hormonal treatments enlarged litter size by 0.5–0.7 piglets, respectively.