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

OESTRUS SYNCHRONISATION
AND MILK EJECTION IN PIGS TREATED
WITH I.C.I. COMPOUND 33.828 AND GONADO-
TROPHINS

A. OSINGA, C. DE HAAN, W.A.G COP and TH. STEGENGA
Department of Animal Husbandry,
Agricultural University,

Wageningen,
THE NETHERLANDS

INTRODUCTION. Nowadays people are very much ;
interested in the oestrus synchronisation in pigs.
This technique should offer better chances foxr-the
application of A.I. in pigs and therefor also for
the application of modern breeding schemes developed
for a more efficient selection. Synchronisation of
weaning time in sows already results in a simple
and cheap way of oestrus synchronisation, but-idhe
results are not consistent.

The more recent methods developed for oestrus
synchronisation are based upon the administration
of gestagens during a certain period. This gesta-
gen will inhibit the follicle development. EErble
medication should be terminated at the same moment
in the different sows, the follicle growth and
ovulation will be synchronized.

Originally pure crystalline progesteron was
injected (1), later experiments were carried out
with the orally administered derivatives of
progesteron (M AP and C A P). There were large
discrepancies between the results of the dicEferenct
experiments and cysts were incidentally found on
the ovaria.

The Animal Husbandry Department of the Agri-
cultural University at Wageningen carried out a few
experiments using the I.C.TI.-compound number BTN BAS
Ta (methylallyl)-2—methyldithio—carbamoyl hydrazine
as a gestagen. (2,3).

(1)
(2}
(3)

—

L.C. ULBERG, R.H. GRUMMER and L.E. CASIDA, 1951.
Jie AN Ma B8 G HOS 665-671.

C. DE HAAN and A. OSINGA, 1966.

Veeteelt en Zuivelber. 9: 123-131.

WEALG.COR, 1968 Neetien Zuivelben, - clilis 2025

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