LLU Center for Fertility IVF & Andrology

Lab Director & Staff


Dr. Chan | LLU Center for Fertility & IVFPhilip J. Chan Ph.D., HCLD

Andrology Lab Director & Technical Supervisor

Dr. Chan joined the Loma Linda University Center for Fertility in 1989 as the lab director of andrology and molecular biology.

Since 1991, he has been a full-time professor in the Department of Gynecology and Obstetrics at the Loma Linda University School of Medicine.

He is board-certified by the American Board of Bioanalysts as an embryo lab director and as a high complexity laboratory director in embryology and andrology.

Read More About Dr. Chan


Samer (Sam) Aridah, B.Sc.

Senior Clinical Embryologist

Sam joined our LLU Fertility Center in 2018.

He received his Bachelor of Science degree in 1987 in medical technology/biological sciences. He has extensive training in the field of reproductive endocrinology and infertility. Sam received his training in the United States, Canada and the U.K. He also received training at the Eastern Virginia Medical School, which is the site of the first IVF program in the U.S. He has long experience in the training and establishment of several IVF centers in the Middle East. Sam was a consultant for some nationally known IVF centers and has trained many embryologists in the IVF field. He is a member of the American Society for Reproductive Medicine (ASRM) and the American Association of Bioanalysis (AAB), as well as the Canadian Fertility and Andrology Society (CFAS).


Donna Espinosa, CLS | Loma Linda University Center for Fertility & IVF | CADonna Espinosa, CLS (ASCP)

Clinical Laboratory Scientist

Donna is a clinical laboratory scientist, who has been working at Loma Linda University Center for Fertility & IVF since 2018.

She received her Bachelor of Science from California Polytechnic University in Pomona and trained as a clinical laboratory scientist at Eisenhower Medical Center in Rancho Mirage, California. Donna has been certified as a reproductive cryobiologist by the American Association of Tissue Banks.

Donna has extensive experience in both hospital and reproductive laboratories. She has previously been the laboratory manager at California Cryobank, Verdugo Hills Hospital and Fallbrook Hospital before coming to Loma Linda University Center for Fertility & IVF.


Leine | LLU Center for Fertility & IVFLeine Velasco, CLS

Leine is a clinical embryologist and has worked at the LLU Center for Fertility since 1998. She is responsible for the majority of clinical laboratory testing conducted in our lab.

In 1981, Leine received her Bachelor of Science degree from the University of Santo Tomas in the Philippines. She came to the U.S. in 1982 where she gained more than 10 years of clinical experience working as a phlebotomist and laboratory assistant at the Sommer-Miller Laboratories, Westside Hospital, Saint Vincent Medical Center in Los Angeles and at Kaiser Permanente in Riverside.

Leine obtained her clinical laboratory scientist (CLS) license in 1992.

*Some portraits are courtesy of Johnny C. Velasquez, photography studio.