novel approaches to expression and detection of oestrus in dairy cows
novel approaches to expression and detection of oestrus in dairy cows
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 />
P4 Concentration, ng/ml<br />
P4 Concentration, ng/ml<br />
7<br />
6<br />
5<br />
Cow 535<br />
25<br />
20<br />
Cow 543<br />
4<br />
3<br />
2<br />
15<br />
10<br />
1<br />
0<br />
5<br />
0<br />
Date<br />
Date<br />
20<br />
18<br />
16<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
Cow 533<br />
40<br />
35<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
0<br />
Cow 534<br />
Date<br />
Date<br />
Figure 5.6 Milk progesterone pr<strong>of</strong>iles from POC 1 <strong>of</strong> <strong>cows</strong> <strong>in</strong> <strong>oestrus</strong>. Progesterone concentration (ng/ml) plotted aga<strong>in</strong>st date; cow 535, 543, 533<br />
<strong>and</strong> 534 were all synchronised <strong>to</strong> come <strong>in</strong><strong>to</strong> <strong>oestrus</strong> shown by high progesterone 123 concentration which decl<strong>in</strong>es thereafter, show<strong>in</strong>g when the cow is<br />
<strong>in</strong> a physiological state <strong>to</strong> enter <strong>in</strong><strong>to</strong> <strong>oestrus</strong>
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