Repro21

Page 1

Relation hypothalamus hypophyse et rétrocontrôle ovarien d’après Bac D session septembre 1991 LH (µg.l-1)

lésion hypothalamus

30 20

LH (ng.ml-1)

40

20 guenon pubère

Perfusions Perfusions Perfusions discontinues continues de GnRH discontinues de de GnRH GnRH guenon pubère

15 10

10

5 -6

-4 -2

0

2

4

6

18 24

J 0

5

10

15

20

25

30

35

45 50

40

lésion hypothalamus LH (ng.ml-1)

0

oestradiol

30

F f

20

lésion hypothalamus

guenon ovariectomisée

10

J

0 0

8

140

148

156

164

172

180

Perfusion discontinue de GnRH

190

55

60 J


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