IN-VITRO FERTILIZATION

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WHAT IS IVF?

IVF is the process of harvesting unfertilized oocytes directly from the ovaries of a donor cow or heifer. These recovered oocytes are then fertilized with semen in a petri dish one day after aspiration and develop in an incubator to become embryos 7 days after fertilization.

 

Oocytes are first collected from the ovaries by ultrasound-guided follicular aspiration. The oocytes are then matured for 24 hours and then fertilized in a petri dish. After fertilzation the embryos are incubated for 7 days during which embryonic development takes place. After the 7 days the resulting viable embryos are then transferred into recipients or frozen.

WHY IVF?

There are several reasons which make IVF advantageous compared to conventional flushing including:

  • Potential to obtain embryos from donors that do not respond to conventional flushing.

  • Collection from donors can occur every two weeks.

  • Pregnant donors can be collected from up to 90-150 days pregnant.

  • Can collect heifers before or after breeding which allows breeders to accelerate genetic improvement.

  • Can use only one straw of semen on multiple donors.

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FREQUENTLY ASKED QUESTIONS