No conversation about female fertility is more important — or more urgently needed in India — than the one about age. Women are increasingly pursuing education, career milestones, and financial independence before starting families, and this is entirely reasonable. But biology does not pause for our plans. Understanding how age affects fertility allows women to make informed, empowered choices — and to seek help at the right time. Dr. Shweta Mendiratta, fertility specialist and gynaecologist in Faridabad, explains what every woman over 30 needs to know.
The Biology of Egg Aging
A woman is born with all the eggs she will ever have — approximately 1–2 million at birth, declining to around 300,000–400,000 at puberty and a few thousand by menopause. Unlike sperm, which are continuously produced, eggs cannot be replaced.
Two things happen to eggs as a woman ages:
- The quantity declines — the ovarian reserve (the number of eggs remaining) decreases with each passing year
- The quality deteriorates — older eggs are more likely to contain chromosomal errors, leading to failed fertilisation, failed implantation, and miscarriage
These changes begin gradually in the mid-20s but accelerate significantly after age 35, and more steeply after 37–38.
Fertility by Decade
In Your 20s
Fertility is at its peak. The probability of conception per cycle is approximately 25–30%. Miscarriage risk is lowest (around 10–15% of confirmed pregnancies).
In Your 30s
Fertility begins to decline, particularly after age 33–34. By age 35, the monthly conception rate drops to approximately 15–20%. This is when ovarian reserve testing becomes meaningful. Miscarriage risk increases to approximately 20–25% by age 35.
In Your Late 30s and 40s
After 37, decline accelerates markedly. By age 40, the monthly conception rate falls to approximately 5–10%. The risk of chromosomal abnormalities (including Down syndrome) rises significantly. Miscarriage risk reaches 30–50% by age 40–44. However, with appropriate support — including medicated cycles, IUI, or IVF — many women over 40 do conceive and carry successful pregnancies.
Testing Your Ovarian Reserve
Ovarian reserve tests do not predict natural fertility precisely, but they guide treatment planning:
- AMH (Anti-Müllerian Hormone): A blood test reflecting the number of remaining eggs. Low AMH suggests diminished ovarian reserve; this test can be done on any day of the cycle.
- Antral Follicle Count (AFC): An ultrasound count of the small follicles visible in the ovaries at the start of the cycle. A lower AFC correlates with lower reserve and poorer response to ovarian stimulation.
- FSH and oestradiol on day 2–3 of the cycle: Elevated FSH suggests the pituitary is working harder to recruit eggs — a sign of diminished reserve.
Dr. Mendiratta recommends that women over 32 who are planning to delay pregnancy have their ovarian reserve tested to allow informed decision-making.
Options for Women Over 35 Who Want to Conceive
Natural Conception
Many women conceive naturally in their late 30s. If you are under 35, try for 12 months before seeking specialist help. If you are 35 or older, seek evaluation after 6 months of trying. If you are 40 or older, seek evaluation immediately.
Ovulation Induction and IUI
For women with good ovarian reserve, ovulation induction with or without IUI can be effective.
IVF
IVF is the most effective fertility treatment for women with diminished ovarian reserve or age-related infertility. Preimplantation Genetic Testing (PGT-A) can be used to select chromosomally normal embryos, reducing miscarriage risk.
Egg Donation
For women with very low ovarian reserve or repeated IVF failures, egg donation offers excellent success rates. This involves using eggs from a younger donor, fertilised with the partner’s sperm, and transferred to the recipient’s uterus.
Egg Freezing (Elective Oocyte Cryopreservation)
Women who wish to delay childbearing can consider egg freezing before age 35 — ideally before 33 — to preserve younger, higher-quality eggs for future use. Dr. Mendiratta can advise on whether this is appropriate for your situation.
Frequently Asked Questions (FAQs)
Q1. I am 36 and just started trying. Should I see a specialist immediately?
Not necessarily immediately, but sooner than a woman in her 20s. If you have no known fertility issues, try for 6 months. If you have irregular cycles, endometriosis, PCOS, or a partner with known sperm issues, see a specialist straight away.
Q2. Can lifestyle changes improve egg quality?
To a degree, yes. Avoiding smoking, limiting alcohol, maintaining a healthy weight, managing stress, and ensuring adequate folic acid, CoQ10, and vitamin D intake can support egg quality. However, these measures cannot reverse age-related decline — they can only optimise the eggs you have.
Q3. If my AMH is low, does that mean I can’t get pregnant?
A low AMH means your ovarian reserve is reduced, not zero. Many women with low AMH conceive, either naturally or with IVF. It means you have less time and may need to proceed more urgently.
Q4. My periods are regular — does that mean my fertility is fine?
Regular periods indicate that you are ovulating, which is a good sign. However, regular cycles do not guarantee good egg quality or normal ovarian reserve. These require specific testing.
Q5. Is IVF safe for women over 40?
Yes, though success rates are lower and the risk of pregnancy complications is higher. Dr. Mendiratta will conduct a full assessment before recommending IVF and will monitor your pregnancy carefully if it is achieved.
Get In Touch With Dr. Shweta Mendiratta
Phone: +91-8130048652 | +91-9999093503
Email: shwetasmendiratta@gmail.com
Yatharth Super Speciality Hospital
Plot No 9, Sector-20, Krishna Nagar, New Industrial Township, Faridabad, Haryana 121007
Phone: +91 8178-939442
Mediclub Gynae ‘N’ Neuro Clinic
Pilot No. 857 Sector 21 C, Faridabad Delhi, Haryana 121001



