About the Practice

Introducing the Staff of the Heartland Center for Reproductive Medicine, PC.

Take a moment to get to know the dedicated staff at Heartland Center for Reproductive Medicine, PC.

Heartland Fertility team

Stephanie L.F. Gustin, MD, FACOG
Reproductive Endocrinologist

Stephanie L.F. Gustin, MD, FACOGDr. Gustin is a board certified Reproductive Endocrinologist. A native Nebraskan, born and raised in Lincoln, Dr. Gustin attended the University of Nebraska — Lincoln for her undergraduate education. Recognized for her outstanding scholarship, leadership and service, Dr. Gustin was inducted into the Mortar Board National Senior Honor Society, and graduated with high honors. Thereafter, Dr. Gustin moved to Washington, DC, where she attended medical school at Georgetown University School of Medicine. She graduated Cum Laude and was admitted to the Alpha Omega Alpha medical Society. For residency, Dr. Gustin switched coasts to train in Obstetrics and Gynecology at Stanford University Hospital. She then remained at Stanford to complete her fellowship in Reproductive Endocrinology and Infertility.

While in her residency and fellowship, Dr. Gustin was awarded the prestigious Arnold P. Gold Foundation in Humanism and Excellence in Teaching Award. She served as the faculty mentor for the Stanford OBGYN residency class of 2016, and was recognized for her commitment to education and mentoring throughout her training. With regards to her research efforts, Dr. Gustin has published or presented on topics throughout the field of Reproductive Endocrinology, including ethnic differences in fertility and reproduction, embryo transfer technique and timing, recurrent pregnancy loss, ectopic pregnancy, and primary ovarian insufficiency. She holds a Faculty appointment at the University of Nebraska Medical Center. Dr. Gustin has a special interest in recurrent pregnancy loss and reproductive genetics. Additionally, Dr. Gustin is able to provide minimally invasive treatment of endometriosis and fibroids, utilizing the da Vinci robotic surgical system for complex minimally invasive procedures. Her practice at Heartland covers all aspects of infertility, including fertility sparing surgery and assisted reproduction. Dr. Gustin met her husband, Dr. Zachary Gustin, in medical school, and together they are the proud parents of two young daughters and one son. She loves spending time with her friends and family, traveling, and staying active throughout the year. She speaks Spanish, conversationally.

Elizabeth Constance, MD, FACOG
Reproductive Endocrinologist

Dr. Constance is double board certified in Obstetrics and Gynecology and Reproductive Endocrinology. Dr. Constance completed medical school at the University of Kansas School of Medicine where she stayed for her residency training in Obstetrics and Gynecology. She then completed fellowship training in Reproductive Endocrinology and Infertility at the University of Michigan. Dr. Constance moved to Nebraska in 2018 to join the Heartland Center for Reproductive Medicine where she serves as Director of Fertility Preservation and LGBTQ+ Health Services. She practices full-scope fertility and reproductive care including assisted reproduction, minimally invasive fertility-sparing surgery, and gender-affirming hormone therapy.
Dr. Constance has published research on bioengineering an artificial ovary system for use in pediatric fertility preservation and the reproductive effects of gender-affirming testosterone therapy. She has also written book chapters on fertility preservation for women with breast cancer and ectopic pregnancy. She holds a faculty appointment at the University of Nebraska Medical Center and enjoys training the next generation of physician leaders in the field of OB/GYN.

Elizabeth Weedin, D.O., M.S.
Reproductive Endocrinologist

Dr. Weedin is a Board Certified Reproductive Endocrinologist who was born and raised in Waverly, Nebraska. Dr. Weedin received her undergraduate degree in Nutritional Science from the University of Nebraska in Lincoln and then moved to Phoenix, Arizona where she attended medical school and graduated from the Arizona College of Osteopathic Medicine. Following medical school, Dr. Weedin completed her general Obstetrics and Gynecology residency as well as her fellowship in Reproductive Endocrinology and Infertility at the University of Oklahoma Health Sciences Center in Oklahoma City, Oklahoma. During her medical training she has been admitted into both Sigma Sigma Phi, the National Honorary Osteopathic service fraternity, as well as to the Alpha Omega Alpha Honor Medical Society. Additionally, she obtained a Masters Degree in Clinical and Translational Science through the University of Oklahoma College of Public Health during fellowship training.

Dr. Weedin’s research interests include polycystic ovary syndrome and the impact of lifestyle, mental, and emotional health, on infertility. Clinically, Dr. Weedin has special interests in Mullerian anomalies, reproductive surgery, multi-disciplinary approaches to patient care, and infertility treatment. Dr. Weedin is very excited to be joining Heartland Center for Reproductive Medicine and will offer the full spectrum of reproductive endocrinology and infertility treatment in her practice.

Personally, Dr. Weedin is best known as “Betsy” and lives in Gretna with her husband, Seth, and their two children, Mabrey and Lanning. She and her family are diehard Husker football fans and also love traveling, being outdoors, baseball, and attending concerts. Personal passions for Betsy include cooking, exercise (especially Orange Theory Fitness!), spending time with her family and friends, and finding the good in every day. The Weedin’s are simply ecstatic to be back in Nebraska and living “the Good Life”!

Abigail A. Delaney, MD FACOG
Reproductive Endocrinologist

Elizabeth Weedin, D.O., M.S.

Dr. Delaney is board certified Reproductive Endocrinologist.  A native Nebraskan, “Abby” was born and raised in Omaha NE.  She graduated Suma Cum Laude from Creighton University with a degree in Biology. ​After college Abby attended medical school and residency at the University of Nebraska Medical Center.  She then completed her fellowship in Reproductive Endocrinology and Infertility at the prestigious Mayo Clinic in Rochester, MN.  Dr. Delaney’s clinical interests include polycystic ovary syndrome, unexplained infertility and recurrent pregnancy loss. 

Meghan B. Oakes, M.D FACOG
Reproductive Endocrinologist

Elizabeth Weedin, D.O., M.S.

Dr. Oakes is a board-certified Reproductive Endocrinologist with deep ties to Nebraska. She was born and raised in Omaha, graduating from Central High School. She attended the University of North Carolina at Chapel Hill, majoring in biology and minoring in chemistry and history. Most importantly, this is where she developed her deep passion for college basketball and all things Tar Heel!

Dr. Oakes returned home to attend medical school at the University of Nebraska Medical Center, where she received numerous scholarships including, the prestigious Regent Scholarship, and was inducted into the Alpha Omega Alpha medical honor society. 

After graduating with honors from UNMC, Dr. Oakes completed her Obstetrics & Gynecology residency at OHSU (Oregon Health & Science University). While at OHSU, she was heavily involved with ACOG (The American College of Obstetrics and Gynecology), serving as both section VIII Junior Fellow Vice Chair and Chair and being selected as 1 of 6 resident reporters to the ACOG annual meeting. She was selected as Administrative Chief Resident by the OHSU faculty and her fellow residents and was awarded the Excellence in Residency Award by the American Association of Gynecologic Laparoscopists. In her final year at OHSU, Dr. Oakes’ original research in PCOS was presented at the annual ASRM (American Society of Reproductive Medicine) meeting in Montreal, Quebec.

Dr. Oakes’ fellowship was completed at the University of Michigan. Her time at U of M was marked by a prodigious research career with 6 journal publications, 2 book chapters and 6 presentations at various national and international meetings. 

Kathleen Yao, DNP, APRN
Women’s Health Care Nurse Practitioner, NCC Board Certified

Dr. Yao received her Bachelor’s degrees in both biology and nursing from Creighton University, followed by a Master’s Degree as a Women’s Health Nurse Practitioner from the College of Nursing at the University of Nebraska Medical Center. She then joined the faculty at the College of Nursing at the University of Nebraska Medical Center, where she served as the Continuing Nursing Education nurse planner and clinical instructor in obstetrics and gynecology. During Dr. Yao’s appointment as the nurse planner, she collaborated with numerous medical and professional disciplines to develop and implement continuing education programs for healthcare providers. In 2017, Dr. Yao received her Doctor of Nursing Practice from the University of Nebraska Medical Center.

She is now one of the Women’s Health Care Nurse Practitioners at Heartland Center for Reproductive Medicine, focusing on general gynecological care and evaluation of infertile couples, and serving as the patient care coordinator for couples undergoing fertility treatment.

Dr. Yao and her husband, Josh, have two daughters and one son.

Tiffany Vasa, NP 
Women’s Health Care Nurse Practitioner, Board Certified

Tiffany Vasa is a board-certified Women's Health Nurse Practitioner.  She has been with Heartland Center for Reproductive since 2022.  She has an additional 5 years of experience in OBGYN and fertility care.  Tiffany initially got into the fertility industry after experiencing the infertility journey herself.  She started as a registered nurse on a labor & delivery unit for 5 years before obtaining her Master's in Nursing degree in Women's Health from the University of Nebraska Medical Center.  She is a member of the American Society of Reproductive Medicine, Sigma Theta Tau International Honors Society and National Association of Nurse Practitioners in Women's Health.   

At the office, she enjoys seeing and interacting with patients, getting to be a part of their personalized fertility journey, and has special interest in the impact infertility has on mental health. 

Outside of work, Tiffany enjoys spending time with her three children, attending sporting events,  traveling, and oil painting.

Barry R. Behr, PhD, HCLD
Director of Laboratories

Barry R. Behr, PhD, HCLDProfessor Behr graduated from University of Nevada-Reno with honors and earned his Ph.D. with emphasis in Reproductive Physiology in 1991, board certified as High Complexity Laboratory Director in 1994, and board certified as Embryology Laboratory Director in 2003.

He is a nationally and internationally renowned clinical and scientific leader in the research and advances of human reproduction. As a world-renown scientist and lecturer, he is highly sought after to chair scientific programs and conferences, is the first non MD President of the Pacific Coast Reproductive Society and has been appointed as program chairman of several professional meetings. Dr. Behr was the former President of the American Association for Bioanalysts for 2015-2016. He is the director of the IVF/ART laboratory at Stanford University and is the Faculty Advisor for the Transgenic, Knockout and Tumor Model Center.

In the 90’s Dr. Behr developed a culture medium for embryo culture to the blastocyst stage, which has improved pregnancy rates, implantation rates and reduced the risks of multiple gestation in IVF. He was also the co-inventor of an embryo selection technology that was featured in Time Magazine's Best of Everything as 8th place in the top 10 Medical Breakthroughs of 2010. Dr. Behr has been widely recognized for his research nationally and internationally. He has published over 200 peer-reviewed publications and book chapters.

Contact Us Today to Schedule an Appointment

If you'd like to learn about any of the services offered at the Heartland Center for Reproductive Medicine, PC, or to schedule a consultation with a member of our staff, please do not hesitate to contact us today.

Heartland Center for Reproductive Medicine

Heartland Center for Reproductive Medicine

Our board certified fertility specialists offer state-of-the-art fertility treatments. An open and inclusive environment, the Heartland Center for Reproductive Medicine can address different causes of infertility and help LGBTQ couples build loving families.

Contact our practice online or call us at (402) 717-4200 to schedule a consultation.

Contact Us Today

Rate, Review & Explore

Social Accounts Sprite