After performing basic science research and leading clinical research studies for several large pharmaceutical companies, Lauren Sundheimer MD, MS, FACOG realized her desire to provide direct patient care to those faced with fertility challenges. She is passionate about her ability to apply science to help her patients achieve their dream of building a family.
She holds undergraduate and graduate degrees from University of California, San Diego. While attending medical school at University of California, Irvine, Dr. Sundheimer developed her passion for women’s health. She completed her residency in Obstetrics and Gynecology at UCLA Medical Center. She was selected to complete sub-specialty fellowship training in Reproductive Endocrinology and Infertility at the combined UCLA and Cedars-Sinai Medical Center program. After practicing in Los Angeles, she is happy to be back in Orange County, where she grew up. Dr. Sundheimer is Board Certified in Obstetrics and Gynecology and she is also Board Certified in Reproductive Endocrinology and Infertility.
Dr. Sundheimer has performed considerable research in the area of reproductive health. Her recent research has involved evaluating preimplantation genetic screening technology and studying the outcome differences among pregnancies requiring IVF and non-IVF fertility treatment.
Spanning the entire spectrum of fertility care, Dr. Sundheimer’s clinical interests range from the diagnosis and management of infertility, to family planning and building, fertility preservation, LGBTQ+ care, and single-parent family-building. Additionally, she treats women with reproductive endocrine issues regardless of their fertility desires, such as PCOS and other abnormal hormone-regulation issues.
She understands the emotional investment of individuals and couples undergoing fertility treatment. Dr. Sundheimer feels it is important to evaluate her patients from a holistic perspective. She provides personal and individualized care. Dr. Sundheimer treats fertility and reproductive endocrine issues while balancing other medical conditions and stressors to provide a comprehensive approach to fertility, fertility preservation, and reproductive endocrinology.
Presentations and Publications
Clinical pregnancy rates after transfer of euploid embryos with abnormal cell division or cell fusion events detected by time-lapse monitoring. Sundheimer LW, Haimowitz Z, Akopians A, Johnson D, Chan W, Surrey M, Danzer H, Ghadir S, Alexander C, Barritt Pacific Coast Reproductive Society Annual Meeting 2020 Abstract. Fertil Steril. 2020
- Higher pregnancy rates are observed after single euploid frozen embryo transfer utilizing time-lapse monitoring technology when compared to traditional embryo incubation. Sundheimer LW, Haimowitz Z, Akopians A, Johnson D, Chan W, Surrey M, Danzer H, Ghadir S, Alexander C, Barritt American Society for Reproductive Medicine Annual Meeting. Philadelphia, PA. October 2019. Poster- P-100.
- Mode of conception does not affect fetal or placental growth parameters or ratios in early gestation or at delivery. Sundheimer LW, Chan JL, Buttle R, DiPentino R, Muramoto O, Castellano K, Wang ET, Williams III J, Pisarska MD. J Assist Reprod Genet. 2018 Jun;35(6):1039-1046. doi: 10.1007/s10815-018-1176-7. Epub 2018 Apr 10. PMID: 29633147.
- RAPH1, a gene regulated by progesterone affects trophoblast migration and invasion. Sundheimer LW, Lee B, Lin Y, DiPentino R, Ghadiali T, Wang ET, Williams J, Pisarska MD. Society for Reproductive Investigation Annual Meeting, San Diego, CA. March 2018. Poster F-156.
- Identification of Previously Undetected Reciprocal Translocations by Comprehensive Chromosomal Screening of IVF Embryos in Patients With and Without Recurrent Pregnancy Loss. Sundheimer LW, Liu L, Buyalos RP, Hubert G, Al-Safi Z, Shamonki M. J Assist Reprod Genet. 2018 Jan;35(1):165-169. doi: 10.1007/s10815-017-1042-z. Epub 2017 Sep 12. PMID: 28900794.
- Sex Differences in the Late First Trimester Human Placenta Transcriptome. Gonzalez TL, Sun T, Koeppel AF, Lee B, Wang ET, Farber CR, Rich SS, Sundheimer LW, Buttle RA; Chen YI, Rotter JI, Turner SD, Williams III J, Goodarzi MO, Pisarska, MD. Biol Sex Differ. 2018, Jan 15;9(1):4. PMID: 29335024.
- PGS/NGS links mitotic complex mosaic embryo diagnosis with chromosomal aneuploidy when comparing physicians using the same IVF laboratory. Sundheimer LW, Akopians AL, Al-Safi Z, Surrey MW, Danzer H, Ghadir S, Chang W, Alexander CJ, Barritt J. American Society for Reproductive Medicine Annual Meeting. San Antonio, TX. October 2017. Poster-428.
- No difference in rates of mosaic, normal, or abnormal diagnosed PGS/NGS embryos within a single IVF laboratory regardless of physician practice location (internal vs. external). Sundheimer LW, Akopians AL, Al-Safi Z, Surrey MW, Danzer H, Ghadir S, Chang W, Alexander CJ, Barritt J. American Society for Reproductive Medicine Annual Meeting. San Antonio, TX. October 2017. Poster-614.
- Maternal 17-β-estradiol and progesterone remain elevated into the late first trimester in pregnancies conceived with in-vitro fertilization (IVF) despite discontinuation of supplemental therapy. Lee B, Buttle R, Castellano K, Sundheimer L, Wang ET, Williams J, Pisarska MD. American Society for Reproductive Medicine Annual Meeting. San Antonio, TX. October 2017. Poster-705.
- “Endometriosis” in Endotext. Carpinello OJ, Sundheimer LW, Alford CE, Taylor RN, DeCherney AH. De Groot LJ, Chrousos G, Dungan K, Feingold KR, Grossman A, Hershman JM, Koch C, Korbonits M, McLachlan R, New M, Purnell J, Rebar R, Singer F, Vinik A, Eds. MDText.com, Inc.: ebook, October, 2017.
- Adverse Perinatal Outcomes Associated with Fertility Treatment in Late Preterm Infants. Wang ET, Sundheimer LW, Quant C, Spades C, Simmons C, Pisarska MD. J Pediatr. 2017 Aug;187:309-312. PMID: 28578160.
- Isolation of Human Primary Trophoblast Cells. Sun T, Gonzalez T, Lee B, Lin Y, Sundheimer L, Williams J III, Pisarska MD. Society for the Study of Reproduction Annual Meeting. Washington, DC. July 2017. Poster-290.
- Abnormal Placentation and Infertility as a Marker of Overall Health. Sundheimer LW, Pisarska MD. Semin Reprod Med. 2017 May;35(3):205-16. PMID: 28658703.
- A Cost-Benefit Analysis of Hysteroscopic Polypectomy Before Controlled Ovarian Hyperstimulation and Intrauterine Insemination in Infertile Women. Sundheimer L, Kathiresan A, Dumesic D, Parvataneni R, Shamonki, M. J Reprod Med. 2017;62:127-132. PMID: 30230303.
- “Infertility” in OB/GYN Secrets 4th Sundheimer LW and McCoy TW. Bader, TJ. Elsevier. April 2016. pp 102-107.
- “Endometriosis” in Endotext. Sundheimer L, Alford C, Taylor R, DeCherney A. De Groot L, Beck-Peccoz P, Eds. MDText.com, Inc.: ebook, October, 2014.
- To Freeze or Not to Freeze: the Cost-Effectiveness of a Freeze-All Policy When Progesterone on the Day of HCG Trigger is Elevated. Patounakis G, Sundheimer L, DeCherney A, Hill M. American Society for Reproductive Medicine Annual Meeting. Honolulu, HI. October 2014. Poster-87.
- Preimplantation Genetic Screening (PGS) of Embryos Prior to Transfer: A Cost Analysis of Single Embryo Transfers (SET) and Double Embryo Transfers (DET). Patounakis G, Sundheimer L, DeCherney A, Hill M. American Society for Reproductive Medicine. Honolulu, HI. October 2014 Annual Meeting. Oral-10.
- Low utilization of extra embryos in donor oocyte In Vitro Fertilization (IVF) Cycles: An ethical dilemma to donor management. Cook H, Sundheimer L, Briton-Jones C, Hill D. American Society for Reproductive Medicine Annual Meeting. San Diego, CA. October 2012. Poster.