Animal Science Journal,
Journal Year:
2023,
Volume and Issue:
94(1)
Published: Jan. 1, 2023
In
mammals,
around
fertilization,
the
nucleolus
of
embryos
transforms
into
precursor
bodies
(NPBs),
which
continue
to
mature
until
blastocyst
stage,
leading
distinct
morphological
changes.
our
study,
we
observed
two
types
nucleolar
morphology
in
mouse
vitro
fertilized
at
four-cell
refer
single
(SN)
and
multiple
nucleoli
(MN).
To
visualize
morphology,
were
immunostained
with
anti-NOPP140
antibody.
These
categorized
five
based
on
number
blastomeres
carrying
SN:
SN4/MN0,
SN3/MN1,
SN2/MN2,
SN1/MN3,
SN0/MN4,
percentages
13,
27,
21,
23
9,
respectively.
Next,
using
a
light
microscope,
divided
without
fixation
groups:
those
least
displaying
SN
(SN
embryos)
(MN
embryos).
Notably,
significantly
more
developed
blastocysts
offspring
18.5
dpc
compared
MN
embryos.
Furthermore,
displayed
higher
NANOG-positive
cell
lower
body
placental
weights,
resulting
fetal/placental
ratio.
findings
suggest
close
association
between
state
stage
subsequent
developmental
potential.
Frontiers in Veterinary Science,
Journal Year:
2024,
Volume and Issue:
11
Published: Jan. 11, 2024
Since
the
1990s,
livestock
industries
have
been
forced
to
respond
major
pressures
from
society,
particularly
with
respect
methane
emissions
and
animal
welfare.
These
challenges
are
exacerbated
by
inevitability
of
global
heating
effects
it
will
on
productivity.
The
same
also
led
questions
about
value
animal-sourced
foods
for
feeding
world.
research
communities
supporting
them
meeting
those
challenges.
For
example,
we
can
now
envisage
solutions
ruminant
problem
improve
efficiency
meat
milk
production.
Animal
welfare
is
a
complex
mix
health,
nutrition
management.
With
‘One
Health’
concept
offering
better
perspectives,
diseases,
such
as
helminth
infection,
compounded
resistance
against
medication,
being
resolved
through
genetic
selection.
stress,
‘fetal
programming’
epigenetic
mechanisms
involved
offer
novel
possibilities
improving
Stress
needs
be
minimized,
including
stress
caused
extreme
weather
events,
emerging
technology
that
reveals
when
animals
stressed,
an
understanding
genes
control
susceptibility
stress.
Indeed,
discoveries
in
molecular
biology
physiological
processes
greatly
accelerate
progress
contributing
genomic
solutions.
Overall,
context
clear
–
food
important
contributor
future
humanity,
but
responses
must
involve
local
actions
relevant
geographical
socio-economic
constraints.
Animals,
Journal Year:
2024,
Volume and Issue:
14(15), P. 2280 - 2280
Published: Aug. 5, 2024
Rectal
and
vaginal
temperatures
are
utilised
in
both
vivo
vitro
models
to
study
the
effects
of
heat
stress
on
oocyte
competence
embryo
viability
cattle.
However,
uterine
temperature
increases
by
only
0.5
°C
heat-stressed
cows,
significantly
lower
than
simulated
models.
Temperature
variations
within
oviducts
ovarian
follicles
during
poorly
understood
or
unavailable,
evidence
is
lacking
that
oocytes
pre-implantation
embryos
experience
mild
(40
°C)
severe
(41
inside
follicle
oviduct
uterus,
respectively.
Gathering
detailed
data
from
reproductive
tract
crucial
accurately
assess
under
realistic
conditions.
Potential
harm
may
result
reduced
nutrient
availability
(e.g.,
diminished
blood
flow
tract)
other
unidentified
mechanisms
affecting
tissue
function
rather
direct
thermal
effects.
Refining
cattle
essential
identify
animals
truly
experiencing
stress,
assuming
exposure
as
done
most
studies.
This
will
improve
model
reliability
aid
selection
heat-tolerant
animals.
