Extend Fertility - Expect Fertility
About Extend Fertility - Expect Fertility
Extend Fertility is a fertility practice in New York City that began with egg freezing and now also treats infertility. Services cover egg freezing, embryo freezing and IVF, and prospective patients can book a free conversation with a fertility advisor before starting treatment. The embryology laboratory was built in 2016 next to the procedure room, connected by a pass-through workstation warmed to body temperature, and uses temperature-controlled benchtop incubators and vitrification for freezing eggs and embryos. Reproductive endocrinologists, nurse practitioners and embryologists staff the practice, which is extending care into New Jersey.
Meet the Doctors
Joshua U. Klein, MD, FACOG
Reproductive Endocrinologist, Chief Clinical Officer
Co-founder of the practice and medical director of its embryology laboratory. The site states he is board certified in obstetrics and gynecology and in reproductive endocrinology and infertility.
Nataki Douglas, MD, PhD
Reproductive Endocrinologist, Chief Scientific Officer
The site states she is board certified in obstetrics and gynecology and in reproductive endocrinology and infertility, and that her research examines what the uterus requires for embryo implantation.
Baruch Abittan, MD, FACOG
Reproductive Endocrinologist
The site lists him as board certified in obstetrics and gynecology, and board eligible in the reproductive endocrinology subspecialty. His research has covered IVF protocols for diminished ovarian reserve.
Joshua Morris, MD, FACOG
Reproductive Endocrinologist
Described as a board-certified obstetrician-gynecologist and fellowship-trained reproductive endocrinologist who also holds a master's degree in medical ethics and law.
Melvin Thornton, MD, FACOG
Reproductive Endocrinologist
An affiliated physician who the site says is not accepting new patients. It states he is double board certified in reproductive endocrinology and infertility and in obstetrics and gynecology.
Lia Schiller, MSN, AGNP-BC
Nurse Practitioner
A board-certified nurse practitioner who moved into fertility care in 2022 after beginning her nursing career on an inpatient women's unit at a cancer center.
Caley Serin, MSN, FNP-C
Nurse Practitioner
A board-certified family nurse practitioner who worked in pediatric oncology before moving into fertility medicine in 2025.
Miriam Kupferstein, MSN, RN, FNP-C
Nurse Practitioner
A board-certified family nurse practitioner with hospital experience in labor and delivery and cardiac care, now part of the practice's New Jersey care.
Dawn Kelk, PhD, HCLD
Scientific and IVF Laboratory Director
Previously directed the IVF laboratory at Yale Fertility Center and other laboratories. Her clinical work includes trophectoderm biopsy and vitrification of blastocysts and oocytes.
Jonathan Lo, MSc
IVF Laboratory Supervisor
His background covers clinical embryology, cryobiology and micromanipulation, including oocyte retrieval, semen preparation, embryo assessment and cryopreservation at previous laboratories.
Location
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