Diminished Ovarian Reserve (DOR): What It Means for Your IVF Journey

Receiving a diagnosis of Diminished Ovarian Reserve (DOR) can feel shocking, especially if you are in your late twenties or early thirties. It is a clinical term that simply means your ovaries have fewer healthy eggs remaining than expected for a woman your age.

It is vital to understand that DOR is not the same as menopause, nor does it mean you are out of eggs or completely unable to conceive. Women with DOR for the most part still ovulate and can still get pregnant. However, a DOR diagnosis does mean your fertility timeline is shorter, and your IVF strategy requires a highly specialized approach.

How Is DOR Diagnosed?

Your ovarian reserve is evaluated through a combination of blood tests and an ultrasound, usually performed at the very beginning of your menstrual cycle.

• Anti-Müllerian Hormone (AMH): This hormone is produced by the small, growing follicles in your ovaries. A low AMH level for a patient’s age is the strongest indicator of a diminished egg reserve.
• Follicle Stimulating Hormone (FSH): Produced by the brain, FSH tells your ovaries to prepare an egg. If your egg reserve is low, your brain has to work harder — pumping out more FSH — to get the ovaries to respond. An elevated menstrual cycle day 3 FSH level (above 10 or 11) is a classic sign of DOR.
• Antral Follicle Count (AFC): During a transvaginal ultrasound, your doctor will count the small, resting follicles, i.e. antral follicles, visible on your ovaries. A low antral follicle count confirms the blood test findings of DOR.

What Causes DOR?

For most women, ovarian reserve naturally declines as they age, accelerating significantly after age 35. However, when DOR occurs prematurely, it can be linked to genetics (a family history of early menopause), previous ovarian surgeries (like the removal of endometriomas), or toxic medical treatments such as chemotherapy or radiation. In many cases, the exact cause of premature DOR remains unexplained.

Tailoring Your IVF Strategy for DOR

The standard approach to IVF is designed to stimulate the ovaries to recruit and mature a large cohort of eggs at once. If you have DOR, your ovaries will simply not produce as many eggs as hoped for, regardless of how high the medication doses are pushed. A successful IVF cycle for a patient with DOR requires a shift in perspective: prioritizing quality over quantity.

To maximize your chances, your fertility specialist will likely customize your protocol:

• Specialized stimulation protocols: Doctors often use specific regimens, such as a microdose Lupron flare or estrogen priming strategy, to coax the ovaries into producing the best possible eggs with the most appropriately aggressive dosages of hormones. Alternatively, a “slow-low” protocol involving mild stimulation may instead be used, since with more advanced DOR, lower doses of medication will generally yield the same modest number of eggs as aggressive stimulation — though the quality of those eggs may be more optimal given the gentler approach.
• Embryo banking: Because a single retrieval might only yield one or two eggs, patients with DOR often undergo numerous back-to-back egg retrieval cycles. This allows you the opportunity to potentially freeze multiple embryos over several months until you have a sufficient number banked before attempting a transfer.
• Using donor eggs: If a patient’s ovarian reserve is significantly low, or if multiple IVF cycles fail to produce a viable embryo, using eggs from a healthy, young donor provides an exceptionally high success rate and a beautiful path to motherhood.

Navigating IVF with DOR requires patience, resilience, and a medical team that treats you as an individual, not a statistic. By acting urgently and employing tailored, creative protocols, patients with DOR successfully build their families every day.