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novel approaches to expression and detection of oestrus in dairy cows

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P4 Concentration, ng/ml<br />

P4 Concentration, ng/ml<br />

11/01<br />

11/01<br />

12/01<br />

12/01<br />

13/01<br />

13/01<br />

14/01<br />

14/01<br />

15/01<br />

15/01<br />

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17/01<br />

17/01<br />

18/01<br />

18/01<br />

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19/01<br />

20/01<br />

20/01<br />

21/01<br />

21/01<br />

22/01<br />

22/01<br />

23/01<br />

23/01<br />

24/01<br />

24/01<br />

25/01<br />

25/01<br />

26/01<br />

26/01<br />

27/01<br />

27/01<br />

P4 Concentration, ng/ml<br />

P4 Concentration, ng/ml<br />

11/01<br />

12/01<br />

13/01<br />

14/01<br />

15/01<br />

16/01<br />

17/01<br />

18/01<br />

19/01<br />

20/01<br />

21/01<br />

22/01<br />

23/01<br />

24/01<br />

25/01<br />

26/01<br />

27/01<br />

Cow 539<br />

Cow 323<br />

40<br />

35<br />

30<br />

25<br />

20<br />

15<br />

10<br />

5<br />

0<br />

8<br />

7<br />

6<br />

5<br />

4<br />

3<br />

2<br />

1<br />

0<br />

18<br />

16<br />

14<br />

12<br />

10<br />

8<br />

6<br />

4<br />

2<br />

0<br />

Date<br />

Cow 320<br />

20<br />

18<br />

16<br />

14<br />

12<br />

10<br />

8<br />

6<br />

4<br />

2<br />

0<br />

Cow 611<br />

Date<br />

Date<br />

Date<br />

Figure 5.7 Milk progesterone pr<strong>of</strong>iles from <strong>cows</strong> <strong>in</strong> POC 2, progesterone concentration (ng/ml) plotted aga<strong>in</strong>st date; <strong>cows</strong> 539, 323, 320 <strong>and</strong> 611<br />

were all synchronised <strong>and</strong> came <strong>in</strong><strong>to</strong> <strong>oestrus</strong><br />

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