(1967) reported that single injections of LH or HCG increased the in vivo ... for 24 hr. One hundred microliters of bovine. LHlI1I were then added and the tubes were ... 5% aqueous solution of plasma from a male dog. (Surve et ci., 1968). After the ..... L. E.. (1964). Effect of progesterone and oxytocin on the pituitary-ovarian.
BIOLOGY
OF
1, 228-233
REPRODUCTION
Progesterone
(1969)
and
Luteal
Luteinizing
Inhibition
by P.
Department
of
A nimal
Sciences,
of
Pathology,
D.
The
concentrations on
of
days
2, 3,
oxytocin-treated was
heifers.
determined
by
significantly but
affect
it did
The
Animal
cause
the
two
at
injections growth
(Armstrong
and
tocin
was
tion
Hansel,
1960; of
Anderson
also
shown
LH
under
strong
and
Hansel,
1958).
Donaldson
that
the
was
reduced
in
Luteinizing with
inhibition
progesterone .05)
3 and
4.
receiving the
secre-
crease
al.,
injected overcame
suggesting
that
Paper
no.
Experiment provided Grant
by HD
3567,
Purdue
University
Station.
Supported
Regionai
Research
02423
from
in project
in
in cattle. reported
comusual
the
U.S.
Public
by
that
increased only
present
funds and
5
Most
significant; LH
on
function.
Day
In the
possibility
that cause
present
exogenous
an
increase
followed
subnormal
by
concentrations
ability
of
by
Health
in a
de-
was
in-
plasma
LH
endogenous
228
and
understand
Hansel
well
(1966)
experiments
suggest-
luteotropic
hormone
Schomberg injections
in vivo
study
stimulate been
major
However, that single the
to has
in vivo
is the
one-half
LH
in vitro 1968).
the LH
between better
Service.
bovine
synthesis (Armstrong,
ing
Agriculturai
NE-41
not
initially
summarized
in
animals
part
found. Day
concentration
to
proved
in I
luteal
might LH
luteum.
the
were until noted,
piasma
the
The
gonadotropin oxytocin
was
cycle
with oxytocin may have released so LH that pituitary stores were insuffi-
