Dr. Sergio B. Pereira


Dr. Pereira was born and raised in the Azores, Portugal. After visiting family in the US several times he decided to move to the US and finish his academic training. Dr. Pereira arrived in the US in January of 1999 and started his academic journey at Merced Community College in Merced California. He then transferred to UC Davis. Dr. Pereira attended St. George’s University School of Veterinary Medicine, in Grenada W.I. and received his Doctor of Veterinary Medicine degree on June 17th 2006. Dr. Pereira received his clinical training from Kansas State University School of Veterinary Medicine.

Upon graduation, Dr. Pereira started working for a Dairy Practice in the Central Valley in California. On January 1st of 2012, he started his own veterinary practice, Azores Veterinary Practice. Dr. Pereira’s main professional interests include bovine veterinary practice and general surgery.

Dr. Pereira is married to Dr. Maria I Rodriguez and they have a son, Sebastian and a daughter, Angela. Dr. Pereira and Dr. Rodriguez met while attending Veterinary School. When having some free time Dr. Pereira enjoys watching soccer, traveling back to the Azores and Puerto Rico and working on expanding his hobby farm.


Dr. Andres Rojas


Dr. Rojas was born and raised in the big city of Santiago, Chile. He received his veterinary degree from Universidad Mayor (Chile) and right before graduation he came to the US and did a long term dairy externship at different clinics and states including NM, TX, CO, ID, NE, WI and CA where he met Dr. Pereira.

After graduation, he practiced part-time for a short period in a mixed animal practice and also worked at his family crop business and small beef cattle operation.

Dr. Andres’s professional interests include milk quality, nutrition, and employee training. In his spare time, he enjoys traveling around with his wife, Camila, spends time outdoors and watches all kinds of sports.


Dr. Marco Valencia


Dr. Marco Valencia was born and raised in the beautiful and very noisy Mexico City.

He attended high school and veterinary medicine school at Universidad Nacional Autonoma de Mexico.

In 2017, he came to the US as a cow breeder for Genex and stayed on a dairy route for a year and a half. This is where he met Dr. Pereira. Afterward, he was promoted as the AI trainer for the west coast of the country for the same company. A year and a half later he left Genex and joined a dairy in Merced, CA, where he bred, did pregchecks and embryo transfer. Dr. Valencia then joined the Azores Vet team in January of 2021.

Dr. Valencia’s interests are reproduction assessment, breeding support and embryo transfer technology. On his days off he likes to play basketball and ride his motorcycle all around the bay.


Dr. Celso Koetz, PhD


Dr. Koetz graduated in Veterinary Medicine at the Federal University of Rio Grande do Sul / Brazil, has a master’s degree in Animal Reproduction at the Federal University of Rio Grande do Sul / Brazil, and a PhD in Animal Science at the Londrina State University/Brazil and Postdoc at the Animal Science department at the Federal University of Rio Grande do Sul / Brazil.

His experience in animal breeding are on the following subjects: bovine reproduction, embryo transfer, ovum pick up (OPU), beef cattle genetic evaluation programs, bull reproductive potential evaluation using noninvasive tools like color Doppler ultrasound and infrared thermography, timed artificial insemination, and beef cattle production systems.


Dr. Jason Yaghoobian


Dr. Jason Yaghoobian was born and raised in Los Angeles, California. He attended the University of California, Davis and graduated with a bachelors degree in animal science. He pursued his doctorate in veterinary medicine at Western University of Health Sciences in Pomona, California, graduating in 2021.

His interest in large animal medicine started when he interned at the on-campus dairy at U.C. Davis, and decided to pursue it seriously after an externship in Chino during veterinary school. He was thrilled to receive an offer from Azores Vet, and gladly accepted.

Professionally, Dr. Jason is interested in advanced reproductive services and surgery. His hobbies include- cooking, hiking, urban exploration, mixology, and grabbing drinks or watching movies with friends.


Dr. Krizia Lepiz


Doctor Krizia Lepiz Conejo was born in the beautiful tropics of Costa Rica. Growing up around her grandfather’s farm played a huge role in her decision to pursue veterinary medicine. She received her bachelor’s degree from Purdue University. During her undergraduate career, Dr.Lepiz developed an interest for the dairy industry and took part in the Midwest Dairy Challenge.

She attended veterinary school at Ross University in Saint Kitts and completed her clinical year at Iowa State University. In pursuit to further her interest in dairy medicine, Dr. Lepiz scheduled an externship in California at Azores Veterinary Practice where she thereafter accepted her dream job as a mixed animal veterinarian. Dr.Lepiz splits her time between Azores Veterinary Practice and True Blue Veterinary Hospital.

On her free time, Dr. Lepiz enjoys traveling, exploring new places with her dog Nax, horseback riding, and cooking.


Dr. Patricia Koetz


Dr. Patricia Fávaro Koetz was born and raised in Brazil, she graduated in Veterinary Medicine in 2015 by University of Northen Paraná, Brazil. Right after Veterinary School, she started a Master’s Degree in Animal Science, researching about thermoregulation and US Doppler in bulls as well as sperm morphology, finishing the program in 2017.

During an externship at Azores Veterinary Practice, California-USA in 2018 she met Dr. Pereira. Back in Brazil she worked for a year with Equine Reproduction, one of her passions, until immigrating to the US in 2019. She lived in Oregon with her husband Dr. Koetz and their son Carlos for three years where she had the opportunity to work as an Embryologist in one of the biggest Bovine In-Vitro fertilization laboratories in the U.S.

Her major interest includes embryo and oocyte development and collection, advanced reproduction technology, equine reproduction, and dentistry. Always with an open mind, Dr. Favaro is willing to learn and get out of her comfort zone.

On days off, she enjoys traveling abroad with her family, hiking to the mountains or exploring wineries with friends.


If you have any questions about our services, please contact us today at (209) 245-7477.