Fertility & IVF
Egg Freezing: How It Works, Best Age, Risks and NY Coverage
Egg freezing (oocyte cryopreservation) uses about two weeks of hormone injections to mature several eggs, which are then collected in a short procedure under sedation and frozen for later. The biggest factor in success is your age when the eggs are frozen: younger eggs are more likely to lead to a healthy pregnancy. It improves your future options, but it doesn't guarantee a baby.
ASRM stopped calling egg freezing experimental in 2012, and it's now widely offered in New York for both medical and personal reasons. Here's what the two weeks actually look like, what it asks of your schedule, and what insurance in New York will and won't pay for.
Who freezes their eggs?
Two main groups:
- Medical (fertility preservation): before chemotherapy, radiation, certain surgeries, or gender-affirming hormone therapy that could harm fertility.
- Planned or elective: to keep the option of a biological child later, while focusing on school, work, or finding the right partner.
Others freeze because of a family history of early menopause, a condition like endometriosis that may affect the ovaries, or religious or personal reasons for not freezing embryos.
Your cycle, day by day
Before you start: consultation and testing. A fertility doctor reviews your history and orders an AMH blood test and an antral follicle count (a transvaginal ultrasound) to estimate how your ovaries will respond. Expect a first visit of about an hour, plus a call with the clinic's finance team. This is when you'll get a medication plan and, often, a box of injectables delivered by a specialty pharmacy.
Days 1 to roughly 10–14: stimulation. You give yourself hormone injections, usually in the belly, for about 8 to 14 days. Nearly everyone is nervous about the first shot. Most people say the anticipation is worse than the needle, which is tiny. Clinic nurses teach you, and many clinics have short videos you can replay.
During this stretch you'll have monitoring visits every one to three days: a quick blood draw and a transvaginal ultrasound to measure follicles. These are usually early in the morning, often 7 to 9 a.m., so you can get to work after. In Manhattan, people commonly pick a clinic near the office rather than home for exactly this reason. If you live in Suffolk or the upper Hudson Valley, ask whether the clinic has a satellite office closer to you for monitoring.
Toward the end, you'll likely feel bloated, like a heavy premenstrual week. Loose waistbands help. Skip high-impact exercise and intense twisting when your ovaries are enlarged; your clinic will tell you what's okay.
Trigger night. When the follicles are ready, you take a final "trigger" injection at a very specific time, often late evening. Set two alarms.
Retrieval day (about 34 to 36 hours after the trigger). A doctor uses a thin needle guided by vaginal ultrasound to collect the eggs while you're sedated. It takes about 15 to 30 minutes. You won't be allowed to leave alone, so line up someone to take you home. Cramping and bloating afterward are normal.
Freezing. Mature eggs are frozen by vitrification, a rapid-freezing method that improves survival. You'll usually get a call that day or the next with how many eggs were retrieved and how many were mature enough to freeze.
Recovery. Most people are back to normal activity in a day or two. Your next period often arrives within one to two weeks and may be heavier than usual.
Years later: using the eggs. When you're ready, eggs are thawed, fertilized with sperm through ICSI, grown into embryos and transferred to the uterus, the same back half as IVF.
What's the best age to freeze?
ASRM and ACOG agree that age at freezing is the strongest predictor of later success. Eggs frozen in your 20s or early 30s are more likely to be chromosomally normal than eggs frozen in your late 30s or 40s.
| Age at freezing | General outlook |
|---|---|
| Under 35 | Best chance per egg; fewer eggs typically needed |
| 35 to 37 | Still good; more eggs usually needed for the same chance |
| 38 to 40 | Lower chance per egg; multiple cycles are often discussed |
| Over 40 | Low chance per egg; your doctor may discuss other options |
These are patterns, not promises. There's no magic number of eggs to freeze. Ask your doctor for an estimate based on your age, AMH and follicle count. ASRM's ethics committee says patients should get individualized, realistic counseling about their chances, so it's fair to ask, "With my numbers, what are my odds of one baby from this many eggs?"
Does AMH tell me how many eggs I'll get?
Roughly. AMH and the antral follicle count help predict how many eggs you may retrieve. They do not measure egg quality, and they don't predict whether you could get pregnant naturally right now. A low AMH may mean fewer eggs per cycle, which helps with planning (sometimes two cycles instead of one). More in our guide to AMH and ovarian reserve.
What are the risks?
Egg freezing is generally safe. Possible risks:
- Ovarian hyperstimulation syndrome (OHSS): bloating, pain and fluid buildup. Severe cases are uncommon, and modern protocols reduce the risk.
- Retrieval risks: bleeding, infection or injury to nearby organs, all rare.
- Medication side effects: bloating, breast tenderness, mood swings, headaches.
- No guaranteed outcome: some eggs won't survive thawing, fertilize or grow.
Available evidence hasn't shown higher rates of birth defects in children born from frozen eggs compared with conventional IVF.
Storage and cost
Vitrified eggs appear to stay stable for many years, and pregnancies have been reported after long storage. The practical issue is cost: most facilities charge a yearly storage fee. Ask what happens if you move away or want to transfer your eggs to another clinic.
Costs vary widely and include monitoring, retrieval, anesthesia, medications and storage. Using the eggs later (thawing, fertilizing and transfer) is a separate bill. Ask each clinic for an itemized written estimate, and ask separately about medication costs, which are often billed by a specialty pharmacy and can surprise people.
Does insurance cover egg freezing in New York?
Since January 1, 2020, New York has required comprehensive individual, small-group and large-group insured plans to cover medically necessary fertility preservation, meaning when a medical treatment may cause infertility, such as:
- Chemotherapy or radiation
- Surgery affecting the ovaries or uterus
- Hormone therapy for gender dysphoria
Covered services include collecting, freezing and storing eggs and the drugs used to retrieve them. Elective egg freezing isn't required under the mandate, though some employers offer it as a benefit. Self-funded employer plans aren't bound by the state mandate. A quick way to find out: call the number on your card and ask, "Is my plan fully insured or self-funded, and is planned egg freezing a covered benefit?" Our New York IVF insurance mandate guide has more.
If you're facing cancer treatment, read fertility preservation before cancer treatment and call a fertility clinic the same week you get your treatment plan.
Eggs or embryos?
If you have a partner or plan to use donor sperm, you might freeze embryos instead. Embryos tell you more about quality, since you can see how they develop. Eggs give you more flexibility, since you don't have to choose a sperm source now. Some people freeze both. Talk through the legal and personal questions before deciding.
Questions to ask at your consult
- How many eggs do you expect I'll get in one cycle?
- How many mature eggs would you suggest I aim for, given my age?
- Where are monitoring visits, and what hours?
- What's the total cost, including medications and the first year of storage?
- What's your process if I need a second cycle?
When to see a doctor
Book a consultation with a fertility specialist if:
- You're thinking about delaying pregnancy and want to understand your options, ideally before your mid-30s
- You have a family history of early menopause or a condition that may affect your ovaries
- You need cancer treatment or another therapy that could affect fertility. Call before treatment begins, since stimulation can often start within days.
New York has many fertility practices offering egg freezing, with the largest concentration in Manhattan. Start with fertility specialists in Manhattan.
Frequently asked questions
What is the best age to freeze your eggs?
Eggs frozen at a younger age, generally before the mid-30s, are more likely to lead to a pregnancy later. Freezing can still help in your late 30s, but more eggs are usually needed and the chances are lower. A fertility specialist can estimate your odds from your age and ovarian reserve tests.
How long does the egg freezing process take?
The active part takes about two weeks: roughly 8 to 14 days of hormone injections with monitoring visits, then a short egg retrieval under sedation.
Does insurance cover egg freezing in New York?
New York requires insured plans to cover egg freezing when a medical treatment, such as chemotherapy or gender-affirming hormone therapy, may cause infertility. Elective egg freezing isn't required, though some employers cover it voluntarily.
How long can frozen eggs be stored?
Eggs frozen by vitrification appear to stay stable in storage for many years. Clinics usually charge a storage fee each year, so ask about ongoing costs.
Does egg freezing guarantee a baby later?
No. Each frozen egg has a limited chance of becoming a baby, and not every egg survives thawing, fertilizes or grows into a healthy embryo. Egg freezing improves your options but doesn't guarantee a future pregnancy.
Sources
- ASRM — Evidence-based outcomes after oocyte cryopreservation for donor oocyte in vitro fertilization and planned oocyte cryopreservation: a guideline
- ASRM — Planned oocyte cryopreservation for women seeking to preserve future reproductive potential: an Ethics Committee opinion
- ACOG — Oocyte Cryopreservation (Committee Opinion 584)
- NY DFS — IVF and Fertility Preservation Law Q&A Guidance for Issuers
This article is for general education and is not medical advice. It does not replace an evaluation by a licensed clinician who knows your history. If you think you have a medical emergency, call 911.