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

 !"#$%&'()*+,-./0
0123.44561&17)/8
+67)/8+ )92:/8+.
;<'6 =#
$%$%4%22% "6> ;?145;1
23.445#@/8445+.41A+
,-6BC;?*,6D4E6FC
+961,.G%4."#$1+
1,+H4()I'J6)*;
+.4<J676(=6 )1,3K
A.4B?;<!=#
$*LME*0HNC*
A?*LME*0H.490:
4+,/8+.4O4K45P.*
<Q=#
R1,+H2;?4C/
,4S+HT2/84#UA2M45;
1,KFV4.2K*.J(/6
:?+W24FV4+HX IQ/<=#
@/8Y.1,1A2Z[;+S
24,+/AX3.4
&+S+B8.,#
R'\48/6*;+1
,;]+XE*F*H>.A0H#
U0H*1,Y/2B^4
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
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2?:451..45\4
&6:?+W;F/6+,BC>45B
**.<'6''6' =#$;/8T
s?-;..N.#U&*
T2t1*/&/^?\4+94A1
:.0H64;.?;WN2
t?\1.1\<'J=#
/*./9j2_2;;
WN.1.2K69>*./9j2__
21;WNT1.-C452K#
N24/8+;9
.424/8+;#
s/82;T24C*
FV4\4+91?4/8#
'# # .//#$0123)
$u2./t%XX
>?01F\2N\4K8/#
v.2%/5e>!#WN:a "1'!)
WNTX*4?2w+44511)K
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@>Y.g.x.%y.+5e\4 ' # (
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B*A,63*?/4B&-
23.NBt?*Y.P#
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Hình 1.2. Qu trình hình thành tinh trùng [32]
& '()* }5‰2Bt:.heK6*:
2/%FCNhY.B5‰2#d*h/
45h+/Ci4*eY.8#
&+()pY..:/286+€.6he
K542C/P.eY.8:.n4OeKo#
&,#  "p;NBtY..AA84K
F.+/A0 eY.8&2Me1heK#
/0 12pB^2.+K0 .,6A2:
4524„F3.heK68:t,#R&
B^^?26j2njB^o#


TBi^*W&4;?\W
OCV4#U8/2^Y.^*4,B
^T*;jh,X4#
Hình 1.4. Tinh trùng trưng thành [39]
 Điều hoà nội tiết nam giới
Vùng dư"i đồi bài tit hormon GnRH theo dạng xung có tc dụng
kích thích tuyn yên tổng hợp và bài tit ra hormon FSH và LH. Cũng
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giống như ,+6//B.4/++:
F#$:•glZ*WAB04Bg%26
--FC,6.Bg%291*WA
M%%6•gl%%0K3*?
,[40]#
d*B•%/+1* +WtB.4
%%#  ‡  .4    B?  ;6  4f  /  B      !4
%%%61c):++:Zgl}‰
.2B46]145K„%%%+:e+41:-
j#l4•lY.,+--*B•%/+t
B%%%#
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177)+HBC;<7J=69%~:4@
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.44&?+W4^+^#@54$7O2
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3.4M4M5,6+M/*B8BH//
*K0HBt4/*#
@2:B8;*4M5u2,+5
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BHd#@?[C/BA43*
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8/.+94*k4:2:8/.\*2eukO2
/8Y/8/Tk4:X#dE*Tk
4:XY/+e.*4284

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1A45.B45&;FZ45
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*M5#g.C1ABH,0BHW4*6?„B.
Z1C.;
,0./W4*024\*2e6+S244
+94*+…64*+S24t^
BA4#dC^O24C^
48/>&+S6241,#
g.C24,Fh&4D
+HY.^A68/.*A*,#
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3V W<9 /-
R&B•%/+C4O40
/8Y.///15.+%B?;\
5%%#}8BA4,6^.h
+\/A*%%%%.+2#U0H1ABi*
ZB„2&2-?]KZB„&?
O1AW>\,#
 !"
3 &<-XY
•+S1;-J446i4X#
dE*%&+SBi\4*4284#R ()B
8%&+S45B')B8%&+S.B

3F \<12-12
$%Hk.Y.5HM@_l\4'ccJ?&2:
^+^2+^M1\^>+/?^
>A:?+W<!!=#$u2.4BH&2:^+^
W5X5t6()BH&2:^+^
14.47t\2 (ŠJ)14!(t
14Q(t?u2/2()#@/8&2:^+^
1A2eA842w#
3H /K;,U
•f*tC2;2f:t.BC{H-B;
+6XKM&Y.+^M#$u2'r (mm
.#R2f*tC,FC84:
1A+S+M/2f*i4K&+^M?
/^.#~SM:?*;/1
A0H61A*+W^*B^4,
BP#
d*/8+.4?B/1A
BA./t*]&FV4+H*4>5
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'
*.444M5,6,BC;
1,+H#$:4Y.>/
h].0H*;1,+Z
[#
 #$%&'!()
33 &T] 
$Z[4'()*;61A
2+/8BE4./^2+4D4C
^6+/84D4C^?;Ž4
%Z[4;+S<!Q=#

Ž4%&2:>*#U0H*;/1A+,&
‰•l%+:F./+,*4•gl•l#
$•gl^KpB8S1*-+WW6-
B?;65•l6%%B?;#b
•gl1C-,+H#U0H
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