Does Pregnancy Chance Decrease After Age 35?

The age at which a woman chooses to have children is not the same for everyone. pregnancy plans may be postponed until later ages because of education, career, financial circumstances, health problems, or because suitable life conditions have not yet been established.

At this point, one of the most frequently asked questions is:

“Does the chance of pregnancy decrease after age 35?”

Yes. Female fertility naturally declines with age, and this change becomes more noticeable after age 35. However, age 35 is not an absolute cutoff. It is possible to conceive naturally and experience a healthy pregnancy after this age.

What is important is understanding the effects of age on ovarian reserve and egg quality, avoiding unnecessary delays in pregnancy planning, and seeking an early evaluation when necessary.

Brief Answer

Yes. The chance of pregnancy in women decreases with age, and this decline becomes more noticeable after age 35.

There are two main reasons for this:

1. A decrease in ovarian reserve
2. An increased likelihood of chromosomal abnormalities in the eggs

Despite this, many women can conceive naturally after age 35. The chance of pregnancy depends not only on age but also on AMH and AFC results, ovulation patterns, whether the fallopian tubes are open, uterine structure, and sperm quality.

The ASRM recognizes female age as one of the strongest predictors of fertility. It reports that natural fertility at around age 40 is approximately half of what it is in the late 20s and early 30s.

Key Information

1. Female fertility begins to decline during the 30s.
2. The decline becomes more noticeable after age 35.
3. Age 35 is not an absolute biological cutoff.
4. A woman’s age is one of the strongest indicators of egg quality.
5. AMH primarily provides information about ovarian reserve and response to treatment.
6. A normal AMH level does not eliminate age-related changes in egg quality.
7. An evaluation is recommended if pregnancy has not occurred within six months in women over age 35.
8. Women over age 40 who are planning a pregnancy should seek an evaluation without delay.
9. With regular monitoring, many risks associated with pregnancy at an advanced maternal age can be managed at an early stage.

How Does Female Fertility Change With Age?

Women are born with the pool of eggs they will use throughout their lives. As age advances, the number of ovarian follicles naturally decreases.

Age-related changes in fertility are not limited to the number of eggs. The likelihood that the eggs are chromosomally healthy may also decline with age.

This process generally progresses as follows:

1. Fertility potential is usually higher during the 20s.
2. A gradual decline begins after age 30.
3. The decline becomes more noticeable after age 35.
4. After age 40, the chances of natural pregnancy and successful IVF using one’s own eggs may decrease more significantly.

This change does not occur at the same rate in every woman. Two women of the same age may have different AMH levels, AFC results, menstrual patterns, and pregnancy histories.

Why Is Age 35 Considered a Turning Point?

Age 35 is not an absolute biological cutoff at which changes occur overnight. In medical practice, it is used as a practical threshold at which increases in fertility-related and pregnancy-related risks become more noticeable.

After age 35:

1. The number of eggs may decrease.
2. The likelihood of chromosomal abnormalities in the eggs may increase.
3. The time required to achieve pregnancy may become longer.
4. The risk of miscarriage may increase.
5. The likelihood of requiring assisted reproductive treatments may rise.
6. The risk of certain pregnancy complications, such as hypertension, preeclampsia, and gestational diabetes, may increase.

ACOG states that age-related risks in pregnancies at age 35 and older should not be evaluated as a single group. Instead, age ranges such as 35–39, 40–44, and older age groups should be considered separately.

Is It Possible to Become Pregnant After Age 35?

Yes. It is possible to conceive naturally after age 35.

A significant proportion of women who become pregnant after age 35 can experience healthy pregnancies. However, achieving pregnancy may take longer, and the likelihood of becoming pregnant during each monthly cycle may decrease as age advances.

The main factors affecting the chance of pregnancy include:

1. The woman’s age
2. Ovulation patterns
3. Ovarian reserve
4. Egg quality
5. Whether the fallopian tubes are open
6. The structure of the uterine cavity
7. Sperm count and quality
8. The presence of endometriosis or fibroids
9. A history of previous pregnancies and miscarriages
10. Smoking, body weight, and general health

For this reason, a person’s individual chance of pregnancy cannot be determined solely by looking at their chronological age.

How Long Should Natural Conception Be Attempted After Age 35?

The recommended waiting period before a fertility evaluation varies according to age.

For women under age 35 who have no known risk factors, an evaluation is recommended after 12 months of regular, unprotected intercourse.

For women aged 35 and older, this period is six months.

For women over age 40, an earlier evaluation may be appropriate as soon as pregnancy planning begins.

However, it may not be necessary to wait even six months in the following circumstances:

1. Irregular menstrual cycles
2. Low AMH or low AFC
3. Endometriosis
4. Previous ovarian surgery
5. Suspected fallopian tube blockage
6. Significant male-factor infertility
7. Recurrent miscarriage
8. A family history of early menopause

How Does Age Affect Ovarian Reserve?

Ovarian reserve refers to the pool of follicles remaining in the ovaries. This reserve naturally decreases with age.

The following parameters are most commonly used when evaluating ovarian reserve:

1. AMH testing
2. AFC, or antral follicle count
3. FSH and estradiol levels during the early phase of the menstrual cycle
4. Response to previous ovarian stimulation
5. A history of ovarian surgery or endometriosis

AMH and AFC are particularly helpful in predicting how the ovaries may respond to medication during IVF treatment. However, neither test alone indicates the chance of natural pregnancy or egg quality.

If AMH Is Normal, Does Age No Longer Matter?

No.

This is one of the misconceptions frequently encountered in clinical practice. A normal or high AMH level may suggest that ovarian reserve has been preserved to a certain extent. However, it does not eliminate age-related changes in egg quality.

For example:

1. A 32-year-old woman with low AMH may have fewer eggs, but those eggs may have a higher likelihood of being genetically healthy because of her younger age.
2. A 42-year-old woman with normal AMH may produce more eggs, but the likelihood of creating a healthy embryo may be lower because of her age.

Therefore, AMH is not a test that replaces female age.

How Do AMH and AFC Affect Pregnancy Planning After Age 35?

AMH and AFC provide complementary information about a woman’s current ovarian reserve.

Low AMH and AFC results in a woman over age 35 may suggest that pregnancy planning should not be delayed. However, a low AMH level alone does not mean that natural pregnancy is impossible.

Why Is Egg Quality Important?

Pregnancy does not depend solely on having a sufficient number of eggs. The egg must also be capable of fertilization, forming a healthy embryo, and allowing that embryo to implant in the uterus.

As age advances, chromosomal number abnormalities may become more common in the eggs. This may lead to:

1. Failure of fertilization
2. Arrested embryo development
3. Implantation failure
4. Biochemical pregnancy
5. Early pregnancy loss
6. An increased risk of certain chromosomal conditions

ACOG reports that the risk of early pregnancy loss increases with age and that this is largely associated with chromosomal abnormalities in the embryo.

Does the Risk of Miscarriage Increase After Age 35?

Yes. The risk of miscarriage may increase with age.

One of the most important reasons for this is the increased likelihood of chromosomal abnormalities in embryos.

According to ACOG’s clinical data, the risk of early pregnancy loss is approximately 9–17% between ages 20 and 30. It may increase to approximately 20% around age 35 and approximately 40% around age 40. These rates do not predict the outcome of an individual pregnancy with certainty; they indicate the general trend of increasing risk with age.

Having previously experienced a healthy pregnancy is a positive finding, but it does not completely eliminate the effect of age on egg quality.

Which Risks May Increase During Pregnancy After Age 35?

Not all pregnancies at age 35 or older are high-risk or problematic. However, the likelihood of certain pregnancy complications may be higher than in younger age groups.

These may include:

1. Gestational diabetes
2. Gestational hypertension
3. Preeclampsia
4. Miscarriage
5. Chromosomal differences
6. Preterm birth
7. Certain placenta-related problems
8. An increased likelihood of cesarean delivery
9. An increased risk of stillbirth in older age groups

ACOG states that the risk of pregnancy-related conditions increases in pregnancies at age 35 and older, but that the level of risk changes progressively with advancing age. Being age 35 alone does not mean that every pregnancy requires the same monitoring plan.

How Are Pregnancies at an Advanced Maternal Age Monitored?

The monitoring plan is determined not only by age but also by the patient’s general health and pregnancy findings.

The following assessments may be performed before and during pregnancy:

1. Blood pressure measurement
2. Blood glucose evaluation
3. Monitoring of thyroid conditions and chronic diseases
4. Ultrasound monitoring
5. Counseling about chromosomal screening tests
6. Nuchal translucency measurement and first-trimester screening
7. Information about cell-free fetal DNA testing
8. Detailed ultrasonography
9. Diagnostic genetic testing options for patients when indicated
10. Assessment of fetal growth and the placenta
11. Individualized planning of the timing of delivery

The same test or procedure is not applied to every pregnant woman over age 35. Screening and diagnostic options are evaluated together with the patient’s preferences, previous medical history, and pregnancy findings.

How Does the Chance of Pregnancy Change After Age 40?

After age 40, the decline in ovarian reserve and egg quality may become more pronounced.

In this age group:

1. The time required to achieve natural pregnancy may become longer.
2. Even if ovulation occurs, the likelihood of forming a healthy embryo may decrease.
3. The risk of miscarriage may increase.
4. Fewer eggs may be obtained during IVF treatment.
5. The likelihood of a live birth using the woman’s own eggs may decrease.
6. Pregnancy complications may require closer monitoring.

The ASRM states that natural fertility at around age 40 may decline to approximately half of what it is in the late 20s and early 30s.

For women over age 40 who are planning a pregnancy, it may be more appropriate to undergo an evaluation at the beginning rather than waiting for several months.

Is IVF Necessary After Age 35?

No. Being age 35 alone does not mean that IVF treatment is necessary.

The possibility of natural pregnancy may continue under the following conditions:

1. Ovulation is regular.
2. The fallopian tubes are open.
3. The uterus is healthy.
4. The sperm analysis is normal.
5. Pregnancy has not been attempted for a long time.

IVF may be considered earlier in the following situations:

1. Pregnancy has not occurred despite six months of regular attempts.
2. AMH and AFC are significantly low.
3. The fallopian tubes are blocked.
4. There is a severe male-factor problem.
5. Endometriosis or an endometrioma is affecting fertility.
6. There have been recurrent miscarriages.
7. Previous intrauterine insemination treatments have failed.
8. The available waiting period is limited because of age.

The treatment decision should be based not only on age or AMH results but on a comprehensive evaluation of the couple.

Does IVF Success Decrease After Age 35?

As age advances, the success rate of IVF treatment using the woman’s own eggs may decline.

The main reasons include:

1. Obtaining fewer eggs
2. A lower likelihood that the eggs are chromosomally healthy
3. A lower number of healthy embryos
4. A reduced likelihood of embryo implantation
5. An increased risk of miscarriage

IVF treatment does not eliminate the effect of age on egg quality. However, it allows eggs and embryos to be evaluated in a laboratory environment, enables the selection of a suitable embryo, and may overcome certain problems involving the fallopian tubes.

Is PGT Necessary for Every Patient of Advanced Maternal Age?

No. PGT, or preimplantation genetic testing, is not a method that must routinely be applied to every patient of advanced maternal age.

In appropriate patient groups, it may help evaluate the chromosomal structure of embryos before transfer. However, it:

1. Does not create healthy embryos.
2. Does not improve egg quality.
3. Does not definitively increase the live birth rate in every patient.
4. May have limited applicability in patients from whom an adequate number of embryos cannot be obtained.

When making the decision, the patient’s age, number of embryos, history of miscarriage, previous treatment failures, and the couple’s expectations should be evaluated together.

When Should Egg Freezing Be Considered?

egg freezing may be considered by women who plan to postpone pregnancy. However, the primary factor affecting success is the age at which the eggs are frozen.

Egg freezing may be considered in the following situations:

1. Pregnancy will be postponed for several years.
2. Ovarian reserve has begun to decline.
3. There is a family history of early menopause.
4. Endometriosis or an endometrioma is present.
5. Ovarian surgery is planned.
6. Medical treatment that may affect fertility is going to be started.

Egg freezing does not guarantee pregnancy in the future. ESHRE recommends evaluating age, ovarian reserve, treatment requirements, and patient expectations together when considering fertility-preservation procedures.

How Does the Decision-Making Process Progress for Women Planning a Pregnancy?

The first step in pregnancy planning after age 35 is not simply obtaining an AMH test. The couple should be evaluated together.

The following factors may be considered during the evaluation:

1. The woman’s age
2. Menstrual cycle patterns
3. AMH and AFC
4. Ovulation status
5. Whether the fallopian tubes are open
6. Uterine structure
7. Sperm analysis
8. The presence of endometriosis or fibroids
9. Previous pregnancies and miscarriages
10. Chronic health conditions
11. How long it is reasonable to wait for pregnancy

Although the ASRM recognizes female age as one of the strongest predictors of fertility, it emphasizes that an infertility evaluation should include a complete medical, reproductive, and family history.

What Approach Does Assoc. Prof. Dr. Nurettin Türktekin Follow in This Situation?

For patients planning a pregnancy after age 35, it is not sufficient to consider only age or a single laboratory result.

In Assoc. Prof. Dr. Nurettin Türktekin’s clinical approach, the following questions are evaluated together:

1. How old is the patient?
2. How long has pregnancy been attempted?
3. What are the patient’s menstrual and ovulation patterns?
4. Is the AMH value appropriate for the patient’s age?
5. What is the AFC on ultrasound?
6. Are the fallopian tubes open?
7. Is there a polyp, fibroid, or adhesion inside the uterus?
8. Is endometriosis or an endometrioma present?
9. What are the results of the partner’s sperm analysis?
10. Has the patient previously experienced pregnancy, miscarriage, or ectopic pregnancy?
11. What were the outcomes of previous intrauterine insemination or IVF attempts?
12. How many children does the couple plan to have?

For example, a short period of natural-conception monitoring may be considered for a 36-year-old patient who ovulates regularly, has open fallopian tubes, and whose partner has a normal sperm analysis.

A more rapid approach may be required for another patient of the same age who has low AMH and AFC values, a history of endometriosis, or a prolonged inability to conceive.

For patients over age 40, evaluation and treatment planning should not be delayed because of age-related changes in egg quality.

The aim is not to evaluate the patient solely under the label of “advanced maternal age pregnancy,” but to create a realistic roadmap based on individual fertility data and pregnancy goals.

What Can Be Done Before Pregnancy?

The following steps may be beneficial for general health and the pregnancy process in women planning a pregnancy:

1. Quitting smoking
2. Avoiding alcohol consumption
3. Reaching a healthy weight range
4. Bringing chronic diseases under control
5. Evaluating current medications for their suitability during pregnancy
6. Planning the initiation of folic acid with a physician
7. Reviewing vaccination status
8. Controlling thyroid conditions, diabetes, and hypertension
9. Maintaining regular sleep and appropriate exercise habits
10. Undergoing a preconception obstetric and gynecological examination

Healthy lifestyle habits do not reverse age-related loss of egg quality. However, they may help improve general health before pregnancy and reduce pregnancy complications.

Common Misconceptions About Pregnancy After Age 35

“It is not possible to become pregnant after age 35.”

Incorrect. Natural pregnancy is possible, but the monthly likelihood of pregnancy may decrease with age.

“Age 35 is the point at which fertility suddenly ends.”

Incorrect. Fertility declines gradually. Age 35 is a clinical threshold at which the decline becomes more noticeable.

“If AMH is normal, age does not matter.”

Incorrect. AMH provides information about ovarian reserve; it does not eliminate changes in egg quality or the effects of age.

“IVF guarantees success after age 40.”

Incorrect. IVF cannot completely overcome the effect of age on egg quality.

“All pregnancies after age 35 are high-risk.”

Incorrect. Risks vary from person to person. Many women can experience healthy pregnancies with regular monitoring.

“If I became pregnant easily before, I will become pregnant easily again.”

Not always. A previous pregnancy is a positive part of the medical history, but age-related changes in fertility continue over time.

“A healthy lifestyle reverses the age of the eggs.”

No. A healthy lifestyle supports general reproductive and pregnancy health, but it does not reverse biological aging.

When Should You Consult an Obstetrician and Gynecologist?

An evaluation should not be delayed in the following situations:

1. You are over age 35 and pregnancy has not occurred within six months.
2. You are over age 40 and are planning a pregnancy.
3. AMH or AFC has been found to be low.
4. You have irregular menstrual cycles.
5. You have been diagnosed with endometriosis or an endometrioma.
6. You have previously undergone ovarian surgery.
7. You have a history of blocked fallopian tubes or ectopic pregnancy.
8. A problem has been identified in the sperm analysis.
9. You have experienced recurrent miscarriages.
10. There is a family history of early menopause.
11. Cancer treatment or ovarian surgery is planned.

An evaluation is recommended after six months for women over age 35 and as early as possible for women over age 40.

Assoc. Prof. Dr. Nurettin Türktekin’s Assessment

Pregnancy after age 35 is common today. Although a healthy pregnancy is possible after this age, the effect of age on egg quality and the chance of pregnancy should not be overlooked.

A clinical evaluation does not consider the AMH result alone. The woman’s age, AFC value, menstrual and ovulation patterns, whether the fallopian tubes are open, the structure of the uterine cavity, and the sperm analysis are assessed together.

A normal AMH value does not eliminate the effect of advanced age on egg quality. Likewise, a low AMH level does not mean that natural pregnancy is definitively impossible.

If pregnancy has not occurred within six months in women over age 35, the evaluation should not be delayed. For women over age 40, it may be more appropriate to undergo an evaluation as soon as pregnancy planning begins.

For some patients, monitoring for natural pregnancy may be sufficient, while for some couples, intrauterine insemination or IVF may be considered earlier. The aim of treatment is not simply to act quickly, but to use the available time appropriately and determine the most suitable option for the couple.

Conclusion

The chance of pregnancy may decrease after age 35, but this does not mean that pregnancy is impossible after this age.

As age advances, ovarian reserve declines and the likelihood that the eggs are chromosomally healthy may decrease. Therefore, the time required to achieve pregnancy may become longer, the risk of miscarriage may increase, and assisted reproductive treatments may be considered earlier for some women.

Fertility is not evaluated solely according to age or an AMH result. AFC, ovulation patterns, the fallopian tubes, uterine structure, and sperm characteristics also affect the chance of pregnancy.

Women over age 35 should consult an obstetrician and gynecologist if pregnancy has not occurred despite six months of regular attempts. Women over age 40 should seek an evaluation as soon as pregnancy planning begins.

An early evaluation does not mean that IVF will be recommended for everyone. The aim is to prevent a loss of valuable time and to plan both the possibility of natural pregnancy and any available treatment options according to the individual patient.

Frequently Asked Questions

Is it possible to become pregnant naturally after age 35?

Yes. Many women can conceive naturally after age 35. However, the time required to achieve pregnancy may become longer, and the monthly probability of pregnancy may decrease.

Is age 35 too late for pregnancy?

No. However, because the decline in fertility becomes more noticeable, pregnancy plans should not be postponed unnecessarily.

How long should pregnancy be attempted after age 35?

If pregnancy has not occurred within six months despite regular, unprotected intercourse, an evaluation is recommended.

Is an AMH test necessary after age 35?

It is not mandatory for every woman. AMH and AFC may be evaluated depending on the pregnancy plan, the duration of infertility, surgical history, or the risk of declining ovarian reserve.

If AMH is normal, is the chance of pregnancy high at age 40?

A normal AMH level may be positive in terms of egg quantity, but it does not eliminate age-related changes in egg quality.

Is it possible to become pregnant after age 40?

Yes. However, the success rates of natural pregnancy and IVF using the woman’s own eggs may decline with age. The evaluation should not be delayed.