About Dr. Ahlering

Your MCRM Medical Director

Peter M. Ahlering M.D., FACOG is medical director and founder of St. Louis’ most advanced fertility care center, the Missouri Center for Reproductive Medicine MCRM Fertility). For nearly two decades, Dr. Ahlering has completely focused on providing compassionate fertility care to those dreaming of having a complete family. Tens of thousands of patients from around the world have received fertility assistance under the careful direction and care of Dr. Ahlering.  Dr. Ahlering has a strong belief that the diagnosis of “unexplained infertility” is simply a myth and that the underlying cause has simply not been fully evaluated.  Dr. Ahlering specializes in male factor fertility, recurrent pregnancy loss/miscarriage and previous failure utilizing ART methods.

Dr. Ahlering comes from a long-line of women’s health professionals.  His father was a well-respected OBGYN in the St. Louis region and today, both of his brothers are well respected OBGYNs in their own right.  Due to his father’s influence, Dr. Ahlering grew up with his own interest in being help to help others and chose to follow in the medical field.  Dr. Ahlering attended the University of Missouri-Kansas City and earned his medical degree through the accelerated medical program.  Dr. Ahlering completed his residency at St. John’s Mercy Hospital in St. Louis, Missouri. During his residency, Dr. Ahlering acted as the consultant editor for a book titled, "Practical Guide to High Risk Pregnancy and Delivery, 2nd Edition." During his last year at St. John's Hospital, Dr. Ahlering became the chief resident of operative laparoscopy and reproductive medicine.

Dr. Ahlering is a board-certified Obstetrician/Gynecologist (OB/GYN),  Fellow of the American Congress of Obstetricians and Gynecologists and member of the St. Louis Physician Alliance.

Dr. Ahlering has been recognized for the past three year's as the "Best Fertility Physician".

He has contributed to multiple scientific papers and to TLC’s “A Conception Story” and has appeared in numerous media outlets.

Dr. Ahlering was a founding partner of Sher Institute for Reproductive Medicine-St. Louis for more than a decade. With a passion of being able to bring to the forefront the latest advancements in science and technology while lowering the cost of care, Dr. Ahlering chose to open a new and more advanced fertility center in 2013, Missouri Center for Reproductive Medicine. Dr. Ahlering remains committed to this desire, today. Since its inception in 2013, MCRM Fertility has delivered to the region the ONLY EmbryoScope time-lapse incubator system and has pioneered a unique and exclusive sperm selection technique, all while delivering the highest pregnancy rates in Missouri.

To schedule an initial consultation with Dr. Ahlering or to learn more about MCRM Fertility call 844-41-4BABY.


After going through IVF at another clinic that felt a little cold and closed off, meeting Dr. Ahlering and your staff has been truly magical.  I didn’t realize that fertility clinics could be so warm  and welcoming or else we would have made the drive to you all years ago.

I really love how he takes the time to answer your questions thoroughly and how he explains how things are looking and next steps. It gives me total confidence in his ability to get me to my end goal which is a baby. I appreciate his bed side manner and I really like his personality. I'd refer him any day to anyone. Whether my journey ends in a completed pregnancy or not.  

Dr. Ahlering is an outstanding doctor! We have really been impressed by his care and the coordinators' care. Everyone at MRCM is very warm and friendly to the patients.

Ahlering, great MD, would refer to anyone having fertility issues! 

Ahlering is just the best! He is kind, caring and explains information in a way that we could understand. He is humble yet extremely knowledgeable, driven but also laid-back. He is wonderful and I am so glad we found him to help us through our infertility journey.  

I had the best experience with Dr. Ahlering and every single person on staff. I cannot say enough wonderful things! We became pregnant on our first frozen transfer. I would highly recommend this practice to everyone.

He is an outstanding doctor. Down to earth and explains everything to us to help us understand everything. We have to drive from paducah and he has been very helpful with our scheduling. We have already recommended him to several other people who will definitly be reaching out to him. 

I have been to 4 other fertility specialists. Dr.Ahlering is the first to explain everything to me in layman's terms. I do appreciate him drawing things out to me and answering all of my questions and concerns.

Dr. Ahlering seems very personable and thorough. Each time we have met with him, he takes the time to listen to our concerns, answers as many questions as we have, and treats us as intelligent in the discussion of our issues.

MCRM and Dr. Ahlering have been wonderful to us. None of this journey is easy, but we rest easier knowing that we are in the best hands.

Dr Ahlering and his staff are amazing. My husband and I couldn't have asked for a better team on this journey.

We are so happy we found MCRM. Dr. Ahlering and his entire staff is are so wonderful and helpful! Best experience we have had!

We have seen Dr. Ahlering for years at this practice and another﴿ and trust his expertise implicitly. He spends all the time we need to explain things to us and we always feel better after speaking with him. He is THE BEST!!!


17300 N. Outer Forty
Suite 101
Chesterfield, MO 63005

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