FAQ Ovum Pick Up bovine

Which animals are eligible for Ovum Pick Up?

All donor cows are suitable for Ovum Pick Up starting from 8-9 months old heifers and including both lactating and dry cows. In addition, pregnant cows until the third month of pregnancy may be also oocyte donors without any risk to the pregnancy.

Are hormonal treatments needed?

There is no need for hormonal treatment before oocyte collection. In fact, this technique does not interfere with normal fertility and milk production.

Is it possible to use sexed semen?

Yes, because a successful in vitro fertilization requires far less sperm as compared to artificial insemination. Therefore, even small amounts of viable semen, as it is often the case with straws of sexed semen, are sufficient to obtain embryos.

How many times can the Ovum Pick Up be repeated?

The Ovum Pick Up may be repeated twice a week for several weeks without side effects and without interfering with the fertility of the donor.

Is it possible to use the semen of more than one bull?

Normally for each Ovum Pick Up only one bull is used but, when the number of oocytes collected is very high (more than 30 oocytes), we recommend using two bulls if more pairings are required.

When does the first fertile oestrus occur after Ovum Pick Up?

After about two weeks.

Can embryos be frozen?

Yes, the embryos produced by Ovum Pick Up are freezable as those produced by superovulation.

How many embryos can be produced per donor from each Ovum Pick Up?

This depends mainly on the age of the donor: the heifers produce 2-3 embryos and the cows 4-6 embryos per oocyte collection.

What are the advantages of Ovum Pick Up compared to superovulation?

The main advantages are: a) it is possible to produce embryos by different pairing in a very short time choosing a different bull for each oocytes collection; b) no hormonal treatments are required, c) there is no effect on milk production of the donor cow and no effect on the udder or on the ongoing pregnancy.