Fig. 4 Enzyme activity and protein content of endometrium during oestrous cycle following a normal (Controls) or synchronized (Treated) oestrus ngEee, 18 Treated Treated 14 e 2 ° Controls c > 10 Controls P< 001 T e Acid phosphatase 0 3 Treated Treated 2 24 ® v :;E) Controls Controls 18 N.S. Alkaline phosphatase ® 400 eieies Treated 3 v 5 00 Controls 2 Controls P < 0-01 0 Protein 100 Regum Treated v 'g 0 Controls c - s P<0.01 Controls 0-2 37=%7 80 141 55150 Day of cycle From data of Murdoch & White (1967). 1368