Vie CONG. INTERN. REPROD. ANIM. INSEM. ARTIF., PARIS, 1968, VOL. I

In a second experiment attempts were made to
shorten the interval from weaning to induced heat
by giving the 1 mg. at weaning and the second mg.
DES on the second day after weaning. The Fq1 sows
exhibited estrus significantly (P« .05) earlier
than the F, sows, Table 3. There was a significant
(P €530) s%rain by treatment interaction whereby Fq
sows given the DES exhibited heat earlier than the
F, sows given similar dosages. The interval from
induced to second heat approximated one estrual
cycle length for both treated and control animals.

(1) G. M. DELA CERNA. 1956. Philippine Journal of
Animal Industry. 17:105-111

(2) H. E. KIDDER, L. E. CASIDA and R. H. GRUMMER.
1955. Journal of Animal Science. 14:470-47W4,

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