الفهرس 
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Abstract
-1-
INTRODUCTION
The an imaL, in oroer t c D,l; of higr. reproductiv\:i efficiem:;”
i 5 u’O’c”,ssary to have a normal phys iological oond.’, t iO[1,
One or the ~:1~i’ p:ny~,:”oloqical pa::-<l.ltlet:ers• ((l,onitoring: the
tlOl’rral ct ;l1:6 vi l’E’PI”Qc.uc~,ion, i~ t:16 hoLf!Iona1 est irnat i.on
p••:c-t. r,ul a r Iy r.hoae cO:lt.ro,;,l.i.ng t ne ovarian fllnct ion in
ferr,odes, :t has heen ;,’ell 8stab:’ished t nat t)1.eova r i an act.i. ..’-
.i t y as lCesulatec oy t he pituit:a1.j1 gOIladotrophic: hormones,
.~.tll,”11 ar e 1t”oteinOU5 in nat ur e , and the 90Clad,,1 st.,roid horrnorio
e \oJ’hieil are lipoid in character, consequently. 3. Siglli:-
i.c ant. pes iti ””C OOtTelil- ion •..o.•uld be deduced be,tween t.he co r.a l
pLut~:”nB, lipids, their metabolites and either the gunadotroph
ic hormo:1e~ cr”,,,,tej by the pituitarf gland or t.ne stel”oid
ho rrnoue s release’ i from t he ovar.ies during the eye t c ovar i.an
a==ivity. However, as ~hB problems reflected to ovarian cycl-
~city in buf f”l<1es, under the ~gi”£)tian envi):onmental condd t>
iUllS, an, common and encic\e at hi.qher rate than those i
cattle, j. is ~ partant t.o search for the poss~ble causes
whicr. ca n be eliminated. }.evert.r ..81ess, t:’lere Ls a great
diffio:;u1ty t.::J do thi , as tl”lE’I’e are many fact-ors acting’ in
olllcipli”ity lik.e feeCling, management, Climate, genetic
cnnstit:.ution, etc. ~11 t.~~se ~actors are known to h~ve a
ui y,,,c:t in[ 1ucnce en the Ilnir.,al reproduct ivi ty .Inst.ead, an
inti·re cr. appro eh should he knocked inor-der to as SOlS:;; t ne
re~ruuuc~ive e:ficacy of ~
I”ep-oductive cycle, pregnancy,
buffalQ cow
pClrt:urition
throug’nnut its
”md puerpe::iu~.