it is suggested that a dramatic increase in the responsiveness of lhrh nerve terminals in the mbh to depolarization by 32 mmol k+/l between 20 and 25 weeks of age ( mean age at onset of lay 21.9 weeks ; range 19-25 weeks ) may reflect the development of hypothalamic responsiveness to the positive feedback action of progesterone .
C0023610
lhrh
C0020663
mbh