Fertility After 35: What You Need to Know

By Dr (TCM) Attilio D'Alberto | Traditional Chinese Medicine Practitioner, Wokingham

The age of 35 has become a medically significant threshold in discussions about fertility — the point at which standard guidance recommends seeking specialist investigation earlier than the usual 12-month rule, and the point at which fertility statistics begin a steeper decline. But the way this information is sometimes communicated leaves many women feeling that they have suddenly crossed a line from fertile to not-fertile, which is far from the truth. As I write in My Fertility Guide: "As a general rule, most women's fertility reduces from the age of 35, but this isn't a cut-off point. You can still fall pregnant naturally after this age — it might just take a little more effort." Understanding what the age-related fertility changes actually are, what you can do about them, and when to seek support makes all the difference between resigned panic and informed, effective action.

On this page

1. What actually changes after 35
2. Understanding the statistics
3. AMH, ovarian reserve and what they really mean
4. Egg quality and chromosomal changes with age
5. IVF after 35: what to expect
6. Age and fertility in traditional Chinese medicine
7. How acupuncture supports fertility after 35
8. Diet, lifestyle and supplement optimisation
9. When to seek help and what investigations to request
10. The role of genetics and individual variation
11. My Fertility Guide
12. References

1. What actually changes after 35

Female fertility is primarily determined by two things: the quantity and quality of the eggs available in the ovaries. Both of these decline with age — but the two aspects decline on slightly different timelines and respond differently to intervention.

Egg quantity (ovarian reserve): Women are born with all the eggs they will ever have — approximately 1–2 million primordial follicles at birth, declining to around 400,000 at puberty and continuing to decline throughout reproductive life. Approximately 1,000 follicles are lost every month through atresia (the natural process of follicle death), and only one of these (in a normal cycle) is rescued to ovulation. By the mid-thirties, the total number of remaining follicles has declined to the point where the decline in monthly probability of conception becomes more noticeable. This is reflected in the AMH level (see section 3).

Egg quality (chromosomal competence): The eggs that remain in the ovaries after 35 are more likely to carry chromosomal abnormalities than younger eggs. This happens because the meiotic spindle apparatus that aligns chromosomes during egg maturation becomes less reliable with age. Chromosomal errors in the egg (aneuploidy) are a major cause of implantation failure and early miscarriage — and the rate of aneuploidy increases steeply from the mid-thirties, reaching approximately 50% at 40 and 80%+ at 44. This is why miscarriage rates rise with age, and why IVF success rates decline even when embryos are created.

Uterine and hormonal factors: The uterine lining's receptivity changes somewhat with age. The endometrium may be less responsive to hormonal stimulation, fibroids are more common, and conditions such as endometriosis may have had more time to develop. FSH levels typically begin to rise in the late thirties as the ovaries work harder to recruit follicles, and LH surges may become less predictable.

2. Understanding the statistics

Population-level fertility statistics are often presented in ways that are either overly alarmist or misleadingly reassuring. Understanding what they actually represent helps put individual circumstances in context.

The most widely cited statistics show that:

• Women aged 35–39 have approximately a 15–20% chance of conceiving in any given cycle (compared to approximately 25–30% for women aged 25–29)
• Approximately 90% of women aged 35–39 who are trying to conceive will do so within two years
• IVF live birth rates per cycle are approximately 25% at 35–37, 19% at 38–39, and 11% at 40–42 (HFEA 2023 data)

What these statistics do not capture:

• Individual variation is enormous — genetics, lifestyle, health status and TCM constitution can place an individual woman far above or below the population average for her age
• Many statistics are based on pre-2010 data from populations who were not optimising fertility with modern supplements, lifestyle interventions or acupuncture
• Natural conception statistics assume no intervention — many women over 35 who were not previously trying can conceive quickly when they begin actively optimising their fertility
• IVF statistics include all women in the age bracket, including those with significant underlying pathology. Women who are healthy at 38 with good ovarian reserve and optimal preparation frequently do better than these averages suggest

The practical implication of the statistics is not to cause alarm but to prompt earlier action — seeking preconception blood tests, beginning acupuncture and optimising lifestyle and supplements earlier rather than waiting a year before investigation.

3. AMH, ovarian reserve and what they really mean

Anti-Müllerian hormone (AMH) is produced by the small follicles in the ovaries and reflects the total number of antral follicles — the pool of follicles available for development. It is the best available marker of ovarian reserve and is commonly tested as part of a fertility work-up after 35.

AMH levels by approximate age (pmol/L):

• 20–25 years: 28–48 pmol/L (high reserve)
• 25–30 years: 22–38 pmol/L
• 30–35 years: 14–30 pmol/L
• 35–40 years: 8–22 pmol/L
• 40–45 years: 2–10 pmol/L

It is important to understand that AMH measures quantity, not quality. A woman with a low AMH at 38 may still have excellent-quality eggs. Equally, a woman with a normal AMH for her age may have a higher-than-expected rate of chromosomal abnormalities. AMH guides the stimulation protocol in IVF (predicting how many eggs will be retrieved) but is not a reliable predictor of natural conception success.

AMH can also be improved. Research has shown that supplements including CoQ10 (ubiquinol form, 600mg daily), DHEA (25–75mg daily under medical guidance), myo-inositol, royal jelly, and bee pollen can support mitochondrial function in the egg and improve the quality of follicular development. As noted in My Fertility Guide, for those with a low AMH level, taking bee pollen, royal jelly, myo-inositol, CoQ10 and DHEA daily can improve egg quality. These should be started at least three months before attempting conception or beginning IVF, as it takes approximately this long for their effects to manifest in the maturing follicle cohort.

4. Egg quality and chromosomal changes with age

Improving egg quality is one of the most impactful things a woman over 35 can do to improve her fertility outcomes. Egg quality is determined primarily by mitochondrial function (the energy supply within the egg cell) and the integrity of the meiotic spindle apparatus that separates chromosomes during egg maturation.

Both of these are affected by:

• Oxidative stress: Free radical damage to mitochondria and DNA within the egg accumulates with age. Antioxidant supplementation reduces this damage — CoQ10/ubiquinol, vitamin E, vitamin C, N-acetyl-cysteine (NAC) and alpha-lipoic acid have all been shown to reduce oxidative damage to eggs.
• Mitochondrial efficiency: CoQ10 is essential for mitochondrial energy production (ATP synthesis). The egg requires enormous amounts of energy during maturation and fertilisation. Ubiquinol supplementation (600mg daily) specifically addresses this — it is the most evidence-supported single intervention for egg quality.
• Blood flow to the ovaries: Adequate circulation brings oxygen, nutrients and hormonal signals to the developing follicle. Acupuncture, exercise and omega-3 fatty acids all support ovarian blood flow.
• Environmental toxins: Endocrine-disrupting chemicals (bisphenol A, phthalates, pesticides) damage egg DNA and mitochondrial function. Reducing exposure in the three months before conception directly reduces these risks.

5. IVF after 35: what to expect

For women over 35 who have been trying to conceive for six months without success, or who have known factors that may complicate natural conception, IVF may be recommended. IVF after 35 requires specific considerations:

• Preparation is more important, not less: Because egg quality declines with age and the reserve is smaller, optimising egg quality through the full three-month preparation protocol (CoQ10, antioxidants, acupuncture, diet, supplements) is especially important. Starting IVF without adequate preparation wastes both money and the limited remaining cycles.
• Preimplantation genetic testing (PGT-A): Chromosomal testing of embryos before transfer (PGT-A) can identify euploid (chromosomally normal) embryos for transfer. This improves the per-transfer success rate in women over 38 and reduces miscarriage risk. The trade-off is that testing embryos in a small cohort may result in no euploid embryos for transfer.
• Egg freezing: Women considering delaying pregnancy who want to preserve fertility can freeze eggs now for use later. Success rates are significantly better with younger eggs — ideally frozen before 37.
• Ovarian stimulation response: Women with lower AMH may produce fewer eggs in response to stimulation. The protocol must be carefully tailored to avoid both poor response (too few eggs) and ovarian hyperstimulation syndrome (OHSS), which is less likely in lower-reserve women but requires careful monitoring.
• Donor eggs: When egg quality or quantity is significantly reduced, donor egg IVF offers a higher success rate than own-egg IVF. The uterus of a woman in her late thirties or early forties typically retains good receptivity, so donor egg cycles can have success rates of 50–60% per transfer.

6. Age and fertility in traditional Chinese medicine

In traditional Chinese medicine, reproductive vitality is rooted in Kidney Jing — the constitutional essence that we are born with and gradually consume throughout our lives. Kidney Jing is what western medicine approximates with the concept of ovarian reserve, and its decline over time corresponds to the natural biological ageing process of the reproductive system.

The classic TCM text the Huangdi Neijing (Yellow Emperor's Classic of Medicine) describes the seven-year cycles of a woman's reproductive life: fertility peaks at 28 (4×7 years), and the first signs of reproductive decline begin at 35 (5×7 years) when, in classic texts, "the yang ming channel begins to decline — the face begins to wither and the hair begins to fall." At 42 (6×7 years), the three yang channels decline further, and at 49 (7×7 years), the Ren and Chong vessels become deficient and fertility ceases. These descriptions correspond broadly to modern understanding of the fertility curve.

However — and this is a key clinical insight — Kidney Jing can be supported, conserved and partially replenished through treatment, diet and lifestyle. The rate of decline is not fixed; it is substantially influenced by how depleted or well-nourished the body's fundamental reserves are. A woman of 38 who has maintained good health, adequate sleep, balanced diet and low stress levels will typically have much better reproductive function than a woman of 33 who has been chronically overworked, poorly nourished and stressed for years. Genetics also play an important role — as noted in My Fertility Guide, a person who has inherited good genes can have children later in life, while another person may have inherited poor genes which causes fertility problems earlier in life.

TCM treatment to support fertility after 35 focuses primarily on:

• Tonifying Kidney Jing and Yin: Nourishing the deep foundational substance that underpins egg quality, AMH and follicular development
• Strengthening Kidney Yang: Supporting the warming, activating aspect of kidney energy that drives ovulation and sustains the luteal phase
• Nourishing Blood: Ensuring adequate Blood to build the uterine lining, nourish the developing follicle and support hormonal production
• Moving Liver Qi and Blood: Addressing the Liver qi stagnation that frequently accompanies the stress and frustration of fertility struggles, and improving pelvic circulation

7. How acupuncture supports fertility after 35

Acupuncture is particularly valuable for women over 35 because it addresses several of the key challenges simultaneously:

• Improving ovarian blood flow: Acupuncture increases blood flow to the ovaries, improving the hormonal and nutritional environment for follicular development. Better-perfused follicles produce better-quality eggs.
• Regulating the HPO axis: Acupuncture helps regulate the hypothalamic–pituitary–ovarian axis, which can become less precisely regulated after 35. This improves follicle recruitment, ovulation timing and luteal phase support.
• Reducing FSH: Elevated FSH — a common finding after 35 as the pituitary works harder to recruit follicles — can be reduced with regular acupuncture and herbal treatment, reflecting improved ovarian responsiveness.
• Supporting the luteal phase: By tonifying Kidney Yang and improving corpus luteum function, acupuncture strengthens progesterone production and luteal phase length — two common areas of deficit in women over 35.
• Reducing stress: Chronic stress accelerates the depletion of Kidney Jing and impairs the hormonal regulation of the cycle. Acupuncture reduces cortisol and addresses the stress component of fertility challenges.
• Improving uterine receptivity: The endometrial environment — uterine blood flow, lining thickness and immunological receptivity — can all be supported by phase-specific acupuncture treatment.

I recommend women over 35 who are trying to conceive begin acupuncture at least three months before attempting conception or starting IVF. This allows the full pre-ovulatory follicle development window to be influenced by treatment. Please book a consultation to discuss your individual picture and plan.

8. Diet, lifestyle and supplement optimisation after 35

Diet and supplementation are evidence-based tools for improving fertility after 35 and have a meaningful impact when started at least three months before conception. Key recommendations from My Fertility Guide:

• CoQ10 (ubiquinol, 600mg daily): The most evidence-supported supplement for egg quality. Ubiquinol (the reduced, active form) is more bioavailable than standard ubiquinone, particularly in women over 35. Start three months before conception or IVF.
• DHEA (25–75mg daily): Improves ovarian response and egg quality in women with diminished ovarian reserve. Should be used under medical supervision as it has androgenic effects. Particularly studied in women with low AMH.
• Myo-inositol (2–4g daily): Supports FSH signalling, improves egg quality and may improve ovarian response in IVF. Particularly useful where PCOS-related insulin resistance is present.
• Royal jelly and bee pollen: Traditional fertility tonics with emerging evidence supporting their effects on egg quality and hormonal balance. Rich in acetylcholine, amino acids and antioxidants.
• Omega-3 fatty acids (EPA and DHA, 1–2g daily): Anti-inflammatory, support egg membrane quality, improve blood flow to the ovaries and uterus, and help maintain adequate lipid reserves during fertility treatment.
• High-quality prenatal multivitamin: A prenatal supplement including methylfolate (rather than folic acid), vitamin D3, vitamin B12, zinc, selenium and iodine should be the foundation of any preconception supplement protocol.
• Melatonin (3mg at night): An antioxidant hormone that protects eggs from oxidative damage and has been shown to improve egg quality in IVF cycles. Safe at low doses short-term but should not be taken long-term without medical advice.
• Diet: The pre-ovulatory diet plan in My Fertility Guide is designed to boost energy, Yin, Jing, omega-3 and Blood levels, supporting both egg quality and ovulation. Key foods include oily fish (salmon, sardines, mackerel), eggs, dark leafy greens, walnuts, almonds, sweet potato, lentils and mung beans. Red and processed meats, refined carbohydrates and alcohol should be minimised.

9. When to seek help and what to request

NICE guidelines recommend that women aged 35–39 seek a GP referral after six months of trying to conceive without success, rather than the standard 12-month recommendation for women under 35. Women aged 40 and over should seek referral without waiting. However, many GPs are reluctant to refer at six months — if you encounter resistance, citing the NICE guideline (CG156) is appropriate.

At initial investigation, request:

• Day 2–5 hormone panel: FSH, LH, oestradiol, AMH, prolactin, TSH (and free T3, free T4, TPO antibodies if TSH is borderline)
• Day 21 (or seven days pre-period) progesterone to confirm ovulation
• Antral follicle count (AFC) on transvaginal ultrasound
• For partners: semen analysis
• Thyroid testing: optimal TSH for fertility is below 2.5 mIU/L, even within the standard laboratory normal range

Bring your BBT charts to any specialist appointment — a series of charts from three or more cycles provides more clinically useful information than a single day-21 progesterone result.

10. The role of genetics and individual variation

Age-related fertility statistics describe population averages, but individual variation is enormous. Some women conceive naturally in their early forties with excellent ease; others face significant challenges in their mid-thirties. Genetics are a primary determinant of this variation — the age at which a woman's mother and maternal grandmother reached menopause is a reasonable predictor of her own ovarian lifespan.

Epigenetic factors — how lifestyle, environment and health status influence gene expression — also play a significant role. Maintaining good health, avoiding environmental toxins, managing stress, prioritising sleep and optimising nutrition are not merely lifestyle recommendations: they are interventions that modulate the gene expression in the eggs and the quality of the mitochondrial environment that determines chromosomal outcome. The three months before conception represent a window of genuine biological opportunity to influence the quality of the eggs that will be ovulated or collected.

11. My Fertility Guide

12. References

HFEA (2023). Fertility treatment 2021: trends and figures. Human Fertilisation and Embryology Authority. hfea.gov.uk

Bentov, Y., & Casper, R.F. (2013). The aging oocyte — can mitochondrial function be improved? Fertility and Sterility, 99(1), 18–22. doi: 10.1016/j.fertnstert.2012.11.031

Xu, Y., et al. (2018). Pretreatment with coenzyme Q10 improves ovarian response and embryo quality in low-prognosis young women with decreased ovarian reserve. Reproductive Biology and Endocrinology, 16(1), 29. doi: 10.1186/s12958-018-0343-0

Gleicher, N., et al. (2010). Miscarriage rates after dehydroepiandrosterone (DHEA) supplementation in women with diminished ovarian reserve: a case series. Reproductive Biology and Endocrinology, 8, 140. doi: 10.1186/1477-7827-8-140