Meijs-Roelofs, H.M.A.

puberty stimulation gonadotrophin level effect oestrogen follicle lesion ovulation release weight animal arcuate nucleus region treatment serum period number hypothalamus development injection hormone concentration adult study endocrinology change increase value ovary arcuate decrease region blood meijs-roelof control content nucleus system fsh release endocr onset van der werff cycle result maturation growth mechanism secretion oestru table day 15 uterine plasma oestradiol function oestrogen treatment body weight feedback influence action experiment gonadotrophin release gonadotropin brain critchlow progesterone adult rats fsh levels ramirez volume factor day 13 pms treatment advancement ovarie electrode prepuberal difference group presence