"Helping to build families is the most rewarding feeling anyone can experience."

Althea O’Shaughnessy



When it comes to treating her patients, Dr. Althea O’Shaughnessy feels a direct and transparent approach is best for her patients.  “I believe in a straightforward, no-nonsense approach in patient care. Patients entering treatment are fearful enough. Truth is a great remedy for fear. I’m always open and honest with my patients, I try my best to assuage their fear, educate them on their journey, and make them feel more comfortable in making decisions about their reproductive options.”

Dr. O’Shaughnessy is New York native, having completed much of her education on the east coast. It was in her ninth-grade biology class that first turned her on to science and the medical field. “I had a teacher who I found a connection with and became really intrigued in pursuing a life in the field of science in some way. She created a spark in me that I just couldn’t ignore,” stated Dr. O’Shaughnessy. 


Dr. O’Shaughnessy took that spark to Hartford, CT where she received her bachelor's degree from Trinity College prior to receiving her medical degree from the University of Rochester School of Medicine & Dentistry. She completed her OBGYN residence back in Connecticut at the University of Connecticut Health Center but followed her heart back to New York for her fellowship in Reproductive Endocrinology at Downstate Medical Center.

Dr. O’Shaughnessy’s impressive career includes practicing at facilities such as Mount Sinai Hospital, Cooper Center for IVF in New Jersey, and the Sher Institute for Reproductive Medicine in New York.

It was just a few years ago that the O’Shaughnessy family - Dr. O’Shaughnessy, her husband and 2 children, packed up and headed out west to Colorado, and she joined the team at Conceptions. “The decision to join the Conceptions team was an easy one for me. I was really captivated by, and still am, about our ability at Conceptions to really individualize patient care. We try to do things to improve their chances of pregnancy as an individual based on science and not try to fit the patient in a box based on protocols,” said Dr. O’Shaughnessy.

Individualized Patient Care

“When a patient comes to meet with me for the first time, the conversation revolves around two important aspects; one, I determine the comfort level of the patient. If they’re not comfortable, we do everything we can to help them get comfortable with fertility care. Two, I provide as much education as the patient is willing to take in. The more educated I can help make my patient, the more in control they are of their own fertility journey. They know what they’re getting into and know they can either stop, change, or shift directions at any time. It’s critically important that the patient knows they are in the driver’s seat.”

Conceptions is one of the best centers out there because of our success rates and our staff. The doctors, the lab, and all the teams trust each other implicitly and work in concert to provide the best possible outcome for our patients. From our expert embryology team to the IVF team, the frozen embryo transfer team, the donor egg team, the patient monitoring team, and the nursing and support staff – we all work together seamlessly and provide the patient with support throughout the entire process.

Dr. O’Shaughnessy also heads up the donor egg program for Conceptions. “Donating your eggs is a very personal decision and needs to be made from a place of altruism. Without it, donors will not get through the procedures needed for a successful donation. All our potential donors visit with an ASRM-certified psychologist to ensure they are emotionally fit for donation in addition to being physically fit.”

A Personalized Fertility Journey

When not treating patients, Dr. O’Shaughnessy can be found either cutting up the dance floor to Latin music like Tito Puente and Arturo Sandoval, spending time on the ski slopes, or enjoying time at home with the family watching anything science fiction! “I was really interested in becoming an astronaut when I was younger. I think if someone said I could go to space tomorrow, I would!”

Dr. O’Shaughnessy learns patience and flexibility from every patient she treats. “There was a patient a few years back that had endometrial cancer. With an open mind, a lot of patience, and finding the right medical providers, we were able to treat the cancer rather than surgically removing her uterus. This incredible woman when on to have two kids. Without patience and flexibility, I don’t know where she would be. It’s an important lesson for providers and patients alike throughout the fertility journey.”

Dr. O’Shaughnessy has been recognized for her work in reproductive endocrinology  as “Best In Medicine” by the American Health Council in 2019. She received the Castle Connolly Top Doctor Award in 2010, 2011, 2012, 2013, 2014, 2015, and 2017. Dr. O’Shaughnessy began publishing and presenting her reproductive medicine findings in 1986 and has more than forty papers and presentations to her credit.

More About Dr. O’Shaughnessy

Meet Dr. O’Shaughnessy

Meet Whitney and Chris


Confident and focused

The staff at Conceptions was phenomenal! They were helpful with checking insurance coverage, provided us with an outline of our IVF journey, and they treated us as more than just a number. Dr. O'Shaughnessy was our doctor for the transfer and we felt very comfortable with her. She is confident and focused. We enjoyed our experiences with the staff in the lab, during the egg extraction, during ultrasounds, and for our transfer. They have impressive equipment and are worth the cost. We are happy to say we got pregnant on our first round of IVF. Thank you for everything Conceptions!

Mary Beth M.

She can make it happen!

Dr. Althea O’Shaughnessy and her team are the best. They have helped me accomplish a dream of mine and have made it reality. I will forever be thankful ! For everyone out there that desires what I do she can make it happen!


Worth it!

We are so very grateful to Dr. O’Shaughnessy and the Conceptions Staff. Thank you for making our journey so comforting and special. Every appointment and every shot was worth it! I can’t imagine life without our boy.

The Calderon Family

We are forever grateful!

Dr. O’Shaughnessy has many years of experience and it showed throughout our time at Conceptions. Thanks to the continued support of Dr. O’Shaughnessy, all of the exceptional nursing staff, amazing sonographers, and all of the wonderful employees at Conceptions we were able to be successful! We could not have done this without Dr. O’Shaughnessy’s knowledge, guidance and encouragement. We are so thankful to everyone at Conceptions who contributed to our journey. Thank you again, we are forever grateful!

Kristine G

Experience Success First Hand

Enroll in Our New Patient Portal!

Give Us a CallMake An Appt

Littleton, Colorado - 303-794-0045

Denver, Colorado - 303-720-7887

Lafayette, Colorado - 303-449-1084

Lone Tree, Colorado - 303-586-6598