Anyone familiar with BioPryn?

[nck21]

I got results back and having a hard time figuring out which cows were AI'd or bred by the clean up bull. All of them are "pregnant" but I think the OD values probably vary from cow to cow. They were AI'd May 13, 14 and 15th then immediately turned out with the bull.

 

[LazyGLowlines]

we use BioPryn, too and all it will tell you is whether the cow is pregnant.  I talked with them to see if there was any way to determine when they were bred or how far along they are and was told they tried to figure out a way but there are just too many variables between cows.

 

[rtmcc]

The BioPryn test as I understand it, will not necessarily tell you if the cow is bred AI or natural.  But we love using the test as I can pull blood on the weekend when I have time, put it in the mail Monday morning and usually have email results by the time I get home on Wednesday afternoon.  Ends up costing us about $3.00 to $3.50 per test total, blood tube, shipping and test work, depending on how many I ship at a time in the flat rate mailer boxes from the post office.

Also, it is very accurate at 30 days past breeding, so its nice to check the show heifers fast without having to palpate them one more time.  Did all the cows that way this fall also.
<cowboy>

 

[nck21]

The results on the left were 38 days after AI and on the right were reported today. Notice that 707 was open in June and now has a higher OD value than the two that were bred. This proves that it varies from cow to cow. I guess I'll know for sure come late February.
   


       70 0.085 Open                                         70 0.563 Pregnant        
52 0.177 Pregnant                                           52 0.559 Pregnant
28 0.116 Open                                              28 0.558 Pregnant
154 0.189 Pregnant                                           154 0.591 Pregnant
707 0.095 Open                                              707 0.687 Pregnant

 

[DL]

BioPryn test identifies a specific placental protein Pregnancy-Specific Protein B (PSPB) in the blood of the cow. What it tells you is that there is a placenta that makes the protein - we assume that this means the cow is pregnant (and in most cases this is true). It cannot tell you if the cow is carrying twins, who the sire is, if the fetus has just died or in the case of cows that have recently calved if the protein is present from the last pregnancy. She is either called pregnant or open based on the presence of the protein.

If you time the blood draw and when the bull is put in you may be able to determine if the cow was AI or ET bred - however if everything happened in a 3 day window the test can't tell you who the daddy is

There is a cut off value where those below are called "open" and those above "pregnant" - from your results the cut off looks in the range of .125. OD is optical density - it is basically a measure of light transmission at a certain wave length

 

[LazyGLowlines]

Also remember it only works 90 days or longer after calving because there is residual placental protein post calving.  Also if she has aborted a calf within a 3 month window it may still show as pregnant.  We've been using BioPryn for a few years now and found it's easier and cheaper than having a vet out.  Plus we can do it on our schedule, not someone elses.

 

[nck21]

I'm pleased with it. Out of 68 we got tested 67 were pregnant. And we should be able to tell the difference between the AI bull and the Simmy clean up bull.