What Causes Embryo Implantation Failure?

embryo transfer is one of the stages of IVF treatment in which couples place the greatest hope. After days of medication, egg retrieval, fertilization, and embryo monitoring, the failure to achieve pregnancy despite the transfer of an embryo described as high quality can cause serious disappointment.

The question couples ask most frequently during this process is:

“Why did the embryo fail to implant?”

Embryo implantation in the uterus is a complex biological process that cannot be explained solely by the transfer procedure. The embryo’s genetic structure, the condition of the uterine lining, the timing of progesterone support, polyps or fibroids inside the uterus, sperm-related factors, and laboratory conditions may all affect the outcome.

Failure of the first embryo transfer does not always mean that there is a serious problem. However, if pregnancy cannot be achieved despite multiple transfers of embryos showing appropriate development, the treatment process should be systematically reassessed.

Brief Answer

Embryo implantation failure is usually not caused by a single factor.

The most common possible causes include:

1. The embryo not being chromosomally healthy
2. Inadequate embryo development
3. Intrauterine polyps, fibroids, or adhesions
4. Inadequate preparation of the endometrium
5. Problems with progesterone timing or levels
6. Endometriosis and adenomyosis
7. Fallopian tube-related problems such as hydrosalpinx
8. Sperm DNA damage
9. Transfer technique and laboratory conditions

Not every test needs to be performed after every failed transfer. The evaluation should be planned according to the woman’s age, the number and development of the embryos, previous transfers, and the couple’s medical history.

Key Information

1. Failure of the first embryo transfer alone does not mean recurrent implantation failure.
2. One of the most common causes is that the embryo is chromosomally unsuitable.
3. Not every embryo that appears high quality under the microscope is genetically healthy.
4. Intrauterine polyps, fibroids, and adhesions may affect implantation.
5. The structure and hormonal timing of the endometrium are as important as its thickness.
6. Hydrosalpinx may reduce IVF success.
7. Endometriosis and adenomyosis may affect implantation in some patients.
8. PGT is not necessary after every failed transfer.
9. Immune system-related tests and treatments should not routinely be applied to everyone.
10. Individualized evaluation helps avoid unnecessary tests and treatments.

What Is Embryo Implantation?

The process by which the embryo settles into the uterine lining is called implantation.

After the embryo is transferred, it does not immediately attach to the uterine wall. It first comes into contact with a suitable area within the uterine cavity and then establishes biological communication with the uterine lining, known as the endometrium.

For successful implantation, the following conditions generally need to come together:

1. An embryo with developmental potential
2. An appropriately prepared endometrium
3. Correct progesterone exposure
4. No structural problem within the uterine cavity that prevents pregnancy
5. Appropriate biological communication between the embryo and endometrium
6. A technically successful embryo transfer

A problem at any of these stages may prevent pregnancy. However, several factors often act together rather than a single cause being responsible.

When Does the Embryo Implant in the Uterus?

The timing of implantation may vary depending on the developmental stage of the embryo.

After the transfer of an embryo at the blastocyst stage, the implantation process usually begins within the following few days. However, it is not possible to determine whether implantation has occurred based on symptoms before the pregnancy test.

After transfer:

1. Mild pelvic pain
2. Spotting
3. Breast tenderness
4. Bloating
5. Having no symptoms at all

do not definitively indicate whether pregnancy has occurred.

A definitive assessment is made with a beta hCG test performed on the recommended date.

What Is the Most Common Cause of Embryo Implantation Failure?

One of the most common causes of embryo implantation failure is that the embryo is not chromosomally suitable.

Under the microscope, the embryo may appear:

1. To have an orderly cell structure
2. To be well developed
3. To be a high-quality blastocyst

Despite this, it may have missing or additional chromosomes.

In this case, the embryo may:

1. Fail to implant in the uterus
2. Result in a short-lived biochemical pregnancy
3. Lead to an early miscarriage

The embryo’s morphological quality and genetic structure are not the same thing. Therefore, the assumption that “A high-quality embryo was transferred, so it should definitely have implanted” is not correct.

Embryo-Related Causes of Implantation Failure

Chromosomal Abnormalities

As maternal age advances, the likelihood of chromosomal abnormalities in the eggs and, consequently, in the embryos may increase.

This becomes particularly important in patients with a history of:

1. Advanced maternal age
2. Recurrent miscarriage
3. Multiple failed embryo transfers
4. A previous pregnancy affected by a chromosomal abnormality

However, chromosomally unsuitable embryos may also develop in younger women.

Inadequate Embryo Development

Even if fertilization occurs, embryo development may not progress at the expected rate.

The following findings may be observed during laboratory monitoring:

1. Slow cell division
2. Significant differences between cells
3. Fragmentation
4. Failure to reach the blastocyst stage
5. Poor blastocyst development
6. Inadequate survival after thawing

These findings may affect the embryo’s implantation potential.

Egg Quality

Egg quality is one of the fundamental factors determining the embryo’s developmental potential.

The main factors that may affect egg quality include:

1. The woman’s age
2. Endometriosis
3. Genetic characteristics
4. Smoking
5. Ovarian reserve
6. Certain metabolic diseases
7. Previous ovarian surgeries

AMH provides information about egg quantity and ovarian response, but it does not directly indicate the genetic quality of the eggs.

Sperm-Related Embryo Problems

Embryo development does not depend only on the egg. The sperm carries half of the embryo’s genetic material.

The following sperm-related problems may affect embryo development:

1. Low sperm count
2. Reduced motility
3. Severe morphological abnormalities
4. Sperm DNA damage
5. Genetic and chromosomal problems
6. Severe male-factor infertility

A standard sperm analysis does not always provide information about sperm DNA integrity. However, sperm DNA fragmentation testing should not routinely be requested after every failed transfer. It may be considered particularly in cases of recurrent failure, miscarriage, or severe male-factor infertility.

Uterus-Related Causes of Embryo Implantation Failure

The intrauterine environment is as important as the embryo for implantation.

Intrauterine Polyps

Endometrial polyps are usually benign structures that develop from the uterine lining.

Polyps may:

1. Affect the area where the embryo is expected to implant
2. Create an irregular surface inside the uterus
3. Cause localized inflammatory changes

Not every small polyp necessarily causes treatment failure. The size and location of the polyp and the history of previous failures should be evaluated together.

Fibroids That Distort the Uterine Cavity

The effect of fibroids on implantation varies according to their location.

Submucosal fibroids, particularly those that grow toward the uterine cavity, may negatively affect implantation.

For fibroids located within the uterine wall, the following factors are evaluated:

1. Size
2. Whether the uterine cavity is distorted
3. Location
4. Previous pregnancy and treatment history

Not every fibroid is surgically removed before IVF.

Intrauterine Adhesions

Intrauterine adhesions may develop after:

1. Curettage
2. Intrauterine surgery
3. Infection
4. Postpartum intrauterine procedures
5. Repeated hysteroscopic procedures

Adhesions may prevent adequate development of the endometrium and the embryo from implanting in a suitable area.

Ultrasound, sonohysterography, or hysteroscopy may be used for diagnosis.

Congenital Uterine Anomalies

A uterine septum, unicornuate uterus, or other structural anomalies may affect the pregnancy process.

However, not every variation in uterine shape causes embryo implantation failure. Some anomalies are more closely associated with miscarriage or preterm birth.

The decision to perform surgery should not be based only on an imaging finding.

Chronic Endometritis

Chronic endometritis is a long-term inflammatory condition of the uterine lining that often causes no symptoms.

In some patients, it may be associated with:

1. Recurrent implantation failure
2. Recurrent miscarriage
3. Abnormal bleeding

A biopsy from the uterine lining and specialized pathological examination may be required for diagnosis. Routine biopsy after every failed transfer is not appropriate.

Hydrosalpinx

Hydrosalpinx is a condition in which the fallopian tube becomes blocked and fills with fluid.

The fluid inside the tube may flow back into the uterine cavity and:

1. Make it more difficult for the embryo to implant
2. Negatively affect the intrauterine environment
3. Reduce IVF success

When significant hydrosalpinx is detected, surgery or another intervention involving the fallopian tube may be planned before embryo transfer.

Adenomyosis

Adenomyosis is the presence of tissue similar to the uterine lining within the muscular wall of the uterus.

In some patients, it may be associated with:

1. Severe menstrual pain
2. Heavy bleeding
3. Enlargement of the uterus
4. Reduced implantation success
5. An increased risk of miscarriage

The treatment decision should be based on the patient’s age, uterine findings, symptoms, and pregnancy plans.

Why Is the Endometrium Important?

The endometrium is the uterine lining into which the embryo implants.

Before transfer, not only its thickness but also the following characteristics are evaluated:

1. Ultrasound appearance
2. Regular structure
3. Whether fluid is present within the uterine cavity
4. Duration of progesterone exposure
5. Previous history of a thin endometrium
6. History of intrauterine surgery

Reaching a certain endometrial thickness alone does not guarantee pregnancy.

Does a Thin Endometrium Prevent Embryo Implantation?

A thin endometrium may reduce the chance of pregnancy in some patients. However, failure of the transfer cannot be predicted based on a single ultrasound measurement.

Possible causes of a thin endometrium include:

1. Intrauterine adhesions
2. Previous curettage or surgery
3. Chronic infection
4. An inadequate hormonal response
5. Conditions affecting uterine blood flow

The underlying cause should be identified before treatment. Treatments supported by limited evidence should not be routinely used.

Can Hormonal Factors Affect Embryo Implantation?

Yes. Hormonal timing is important during embryo transfer.

Progesterone Support

Progesterone prepares the uterine lining for embryo implantation.

Particularly in frozen embryo transfers, the following aspects of progesterone are important:

1. The time it is started
2. The method of administration
3. The dose
4. The duration between starting progesterone and the day of transfer

Inadequate progesterone levels or incorrect timing may affect success in some patients.

Thyroid Disorders

Uncontrolled thyroid disorders may affect pregnancy and the early pregnancy period.

However, unnecessary treatment should not be given for mild changes with limited clinical significance. Results should be interpreted together with the pregnancy plan and other hormone values.

Elevated Prolactin

Significantly elevated prolactin may disrupt ovulation and hormonal balance.

If elevated results are repeatedly observed before IVF treatment, the underlying cause may be investigated.

Uncontrolled Diabetes and Metabolic Problems

Uncontrolled blood sugar may affect:

1. Embryo development
2. The intrauterine environment
3. The risk of pregnancy loss
4. Pregnancy complications

Diabetes, thyroid disease, and other chronic conditions should be brought under control before IVF.

Can Endometriosis Affect Embryo Implantation?

Endometriosis may affect egg quality, embryo development, and the intrauterine environment for implantation in some patients.

Treatment planning should be performed more carefully, particularly in the presence of:

1. Advanced-stage endometriosis
2. Adenomyosis
3. Bilateral endometriomas
4. Diminished ovarian reserve
5. Previous ovarian surgeries

However, not every patient with endometriosis experiences an implantation problem. Endometriosis should not be considered the cause of every failed transfer.

Can the Immune System Affect Embryo Implantation?

The immune system plays a role in the establishment of pregnancy. However, many unnecessary tests and treatments with limited evidence are used in this area.

The routine use of the following in every patient is not appropriate:

1. NK cell testing
2. Extensive immunological panels
3. Intralipid
4. Corticosteroids
5. Immunosuppressive medications
6. Lymphocyte immunization therapy

Conditions such as antiphospholipid syndrome, which have a better-established association with pregnancy loss, may be investigated in appropriate patients.

Immune treatments should only be planned when there is a clear medical indication.

Can Blood Clotting Disorders Affect Implantation?

Some acquired clotting disorders may be associated particularly with recurrent pregnancy loss.

However, hereditary thrombophilia testing does not need to be performed routinely after every failed embryo transfer.

Blood-thinning medications should only be used for reasons such as:

1. An identified medical risk
2. A history of thrombosis
3. Antiphospholipid syndrome
4. Hematology evaluation

Uncontrolled use of blood-thinning medications may increase the risk of bleeding.

Does the Transfer Technique Affect Success?

It is important for the embryo transfer to be performed carefully from a technical perspective.

Technical factors that may affect success include:

1. Difficulty passing through the cervix
2. Increased uterine contractions during transfer
3. Blood or mucus on the catheter
4. Failure to place the embryo in the appropriate location
5. A prolonged procedure
6. The embryo remaining in the catheter after transfer

Ultrasound-guided transfer performed while avoiding trauma helps the procedure progress in a more controlled manner.

Does the Embryology Laboratory Affect Success?

Yes. The laboratory environment in which the embryo develops plays an important role in IVF outcomes.

The following laboratory conditions are important:

1. Temperature and humidity balance
2. Gas concentrations
3. Culture media
4. Incubator quality
5. Embryologist experience
6. Freezing and thawing techniques
7. Quality-control procedures
8. Preservation of environmental conditions during procedures

Significant differences in embryo development between separate treatment cycles in the same patient may require laboratory and biological factors to be assessed together.

What Is Recurrent Implantation Failure?

There is no single number or definition of recurrent implantation failure accepted by everyone.

The assessment considers not only the number of transfers but also:

1. The developmental stage of the transferred embryos
2. Embryo quality
3. Whether PGT results were available
4. The woman’s age
5. The total number of embryos transferred
6. Previous pregnancy history

A single failed embryo transfer is not considered recurrent implantation failure.

A more detailed evaluation may be considered particularly when pregnancy has not occurred despite the transfer of multiple well-developed embryos or embryos assessed as genetically suitable.

Is Failure of the First IVF Attempt Normal?

Yes. Failure of the first attempt is common.

No embryo transfer during IVF provides a 100% guarantee of pregnancy.

After the first failure, it is not automatically necessary to:

1. Repeat every test
2. Start uncontrolled additional treatments
3. Perform PGT in every case

The details of the treatment cycle should first be reviewed:

1. How many eggs were retrieved?
2. How many were mature?
3. What was the fertilization rate?
4. Until which day did the embryos develop?
5. How was the transfer technically?
6. Was the endometrium suitable?
7. How well did the patient comply with the medications?

Which Assessments May Be Performed After Repeated Failures?

The same tests are not performed for every patient. Assessments are planned according to previous treatment outcomes.

Review of Embryo and Laboratory Records

The following data are reviewed:

1. Number of eggs retrieved
2. Proportion of mature eggs
3. Fertilization rate
4. Embryo development rate
5. Blastocyst formation rate
6. Embryo quality
7. Freezing and thawing outcomes
8. Developmental day of the transferred embryo

This review may sometimes provide more information than new tests.

Detailed Ultrasonography

Ultrasound may be used to assess:

1. Polyps
2. Fibroids
3. Adenomyosis
4. Uterine shape abnormalities
5. Hydrosalpinx
6. Endometrial structure
7. Ovarian cysts

Hysteroscopy

Hysteroscopy is the direct visualization of the uterine cavity with a camera.

It may be considered in the following situations:

1. Suspicious findings on ultrasound
2. Suspected intrauterine polyps or adhesions
3. Recurrent failed transfers
4. Previous intrauterine surgery
5. Abnormal bleeding
6. Recurrent miscarriage

Routine hysteroscopy is not necessary after every failed transfer.

Hormonal and Metabolic Assessment

Depending on the patient’s history, the following may be assessed:

1. TSH
2. Prolactin
3. Blood glucose
4. HbA1c
5. Progesterone
6. Other necessary hormones

Sperm Assessment

In addition to a standard sperm analysis, the following may be considered in selected patients:

1. Sperm DNA damage
2. Genetic testing
3. Urological examination
4. Varicocele assessment

PGT Assessment

PGT-A may be considered in the following situations:

1. Advanced maternal age
2. The availability of a sufficient number of blastocysts
3. Recurrent miscarriage
4. Selected cases of recurrent failed transfers
5. A previous pregnancy affected by a chromosomal abnormality

However, PGT:

1. Does not create healthy embryos.
2. Does not explain every failure.
3. Does not guarantee pregnancy.
4. May not benefit every patient with only a small number of embryos.

Does PGT Increase Embryo Implantation?

PGT-A may help select an embryo with a suitable number of chromosomes.

In some patients, this may:

1. Reduce the number of transfers involving unsuitable embryos
2. Increase the chance of pregnancy per transfer
3. Reduce the risk of miscarriage caused by chromosomal abnormalities

However, PGT does not make existing embryos healthier and does not increase the total number of healthy embryos.

The additional benefit of routine PGT may be limited, particularly in young and low-risk patients.

Are Endometrial Tests Necessary for Every Patient?

There are various tests claimed to assess the implantation window or the microbial structure of the uterine cavity.

However, it cannot be said that these tests:

1. Increase pregnancy rates in every patient
2. Are necessary for routine use
3. Definitively explain recurrent failure

Testing may be considered only in selected patients, taking into account the characteristics of previous transfers, progesterone timing, and the clinical history.

Is Bed Rest Necessary After Embryo Transfer?

Prolonged bed rest is not necessary for most patients.

After embryo transfer:

1. Going to the toilet
2. Climbing stairs
3. Taking a light walk
4. Continuing daily activities

does not cause the embryo to fall out of the uterus.

Unless the doctor has recommended otherwise, light daily activities may be continued.

Heavy exercise, intense physical activity, and excessively hot environments may be avoided for a period.

Can Lifestyle Affect Embryo Implantation?

Lifestyle alone does not explain every treatment failure. However, it is important for general reproductive and pregnancy health.

The following steps may be supportive during treatment:

1. Quitting smoking
2. Avoiding alcohol consumption
3. Reaching a healthy weight range
4. Maintaining regular sleep
5. Exercising at an appropriate level
6. Controlling chronic diseases
7. Avoiding supplements not recommended by a doctor
8. Taking medications regularly

Stress alone is not considered a direct cause of embryo implantation failure. However, the treatment process may be emotionally exhausting, and psychological support may help patients manage the process.

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

When evaluating embryo implantation failure, the first question is not simply, “Which tests should we perform?”

In Assoc. Prof. Dr. Nurettin Türktekin’s clinical approach, the entire failed treatment cycle is reviewed first:

1. How old is the woman?
2. What are her AMH and AFC values?
3. How many eggs were retrieved?
4. How many eggs were mature?
5. What was the fertilization rate?
6. How many embryos reached the blastocyst stage?
7. What was the developmental quality of the embryos?
8. Was the transferred embryo evaluated with PGT?
9. What were the thickness and structure of the endometrium?
10. When was progesterone started, and at what dose?
11. Was the transfer technically easy?
12. Are there polyps, fibroids, or adhesions inside the uterus?
13. Is hydrosalpinx or adenomyosis present?
14. Is there a history of endometriosis?
15. What were the sperm analysis and previous embryo-development results?
16. Has pregnancy or miscarriage occurred before?

After the first failed transfer, a detailed review of treatment records may often be sufficient instead of performing every possible test.

If pregnancy has not occurred despite multiple transfers of well-developed embryos, the uterine cavity, hormonal timing, sperm-related factors, and PGT in appropriate patients may be reconsidered.

The aim is not to add a new treatment after every failure, but to plan treatment directed at an actual identified cause.

In Which Patients May Hysteroscopy Be Considered?

Hysteroscopy may be considered in the following situations:

1. A suspicious finding is present within the uterus on ultrasound.
2. A polyp or adhesion is suspected.
3. There is a history of previous intrauterine surgery.
4. Abnormal bleeding is present.
5. Recurrent miscarriage has occurred.
6. Pregnancy has not occurred despite the transfer of multiple suitable embryos.

If the uterine cavity appears completely normal on ultrasound, hysteroscopy is not necessary after every failed transfer.

In Which Patients May PGT Be Considered?

PGT-A may be more meaningful in the following situations:

1. Advanced maternal age
2. The availability of multiple blastocysts
3. Recurrent miscarriage
4. A previous pregnancy affected by a chromosomal abnormality
5. Recurrent failed transfers
6. When embryo selection may change the transfer plan

In a patient with diminished ovarian reserve and only one embryo, the potential benefit of PGT should be discussed together with the limitations of embryo biopsy and freezing.

Why Should Unnecessary Treatments Be Avoided?

Couples experiencing repeated treatment failure may become willing to try every suggested option. This may lead to the use of treatments supported by limited evidence or procedures that are unnecessary.

Procedures that should not be routinely applied to every patient include:

1. Extensive immunological test panels
2. Intralipid
3. Uncontrolled corticosteroid treatment
4. Blood-thinning medications
5. Unnecessary antibiotics
6. Repeated endometrial scratching procedures
7. Intrauterine infusions supported by limited evidence
8. PGT without a clear indication
9. Unnecessary hysteroscopy

The scientific basis and expected benefit of any treatment should be discussed openly with the couple.

When Should You Consult an Obstetrician and Gynecologist?

IVF treatment is already conducted under specialist supervision. However, the treatment plan should be reassessed in detail in the following situations:

1. Multiple failed embryo transfers
2. Failure to achieve pregnancy despite transfer of a genetically suitable embryo
3. Recurrent biochemical pregnancies
4. Recurrent miscarriage
5. Suspected intrauterine polyps, fibroids, or adhesions
6. Hydrosalpinx
7. Adenomyosis or endometriosis
8. A thin endometrium
9. A history of difficult embryo transfer
10. Severe male-factor infertility
11. Embryos repeatedly failing to reach the blastocyst stage
12. Inadequate explanation regarding the previous treatment plan

To understand the cause of failure, it is important to evaluate treatment records, embryology reports, and the medications used together.

Common Misconceptions About Embryo Implantation Failure

“If the first IVF attempt failed, I no longer have a chance.”

Incorrect. Many couples achieve pregnancy in later attempts.

“A high-quality embryo will definitely implant.”

Incorrect. Appearance under the microscope does not indicate genetic health or guarantee pregnancy.

“If I walk after the embryo transfer, the embryo will fall out.”

Incorrect. Normal daily movements do not cause the embryo to fall out of the uterus.

“Implantation failure is entirely caused by the woman.”

Incorrect. Embryo, sperm, laboratory, and transfer-related factors may also be involved.

“PGT should be performed after every failure.”

Incorrect. PGT should only be considered in an appropriate patient group.

“Every failed transfer is caused by an immune problem.”

Incorrect. The benefit of most routine immunological tests and treatments is unclear.

“If the endometrium is thick, the embryo will definitely implant.”

Incorrect. Although thickness is important, endometrial structure and hormonal timing also affect implantation.

“Continuous bed rest is required after transfer.”

Incorrect. Most patients may continue light daily activities.

“Stress definitely prevents embryo implantation.”

Incorrect. Stress alone is not considered a direct cause of implantation failure.

Assoc. Prof. Dr. Nurettin Türktekin’s Assessment

Embryo implantation failure is one of the most complex issues in IVF treatment. In most cases, there is no single cause, and not every failed transfer means that a serious disease is present.

The evaluation should first consider embryo development, the woman’s age, ovarian reserve, intrauterine structure, progesterone timing, and sperm characteristics together. Detailed embryology records from previous treatments may provide more valuable information than new tests.

In recurrent failure, the aim is not to request a large number of tests, but to select the correct assessment that may change the outcome. Hysteroscopy may be necessary for some patients, treatment of hydrosalpinx or adenomyosis for others, and PGT or sperm assessment for selected cases.

Immune treatments supported by limited evidence, unnecessary use of blood-thinning medications, or applying the same additional procedures to every patient are not appropriate. Treatment should be individualized according to the couple’s previous results and actual risk factors.

Conclusion

Embryo implantation failure cannot be explained by a single cause.

The embryo’s chromosomal structure, egg and sperm quality, intrauterine polyps or fibroids, hydrosalpinx, endometriosis, adenomyosis, endometrial preparation, and transfer technique may all affect the outcome.

Failure of the first embryo transfer does not mean that pregnancy will not occur in the future. However, if pregnancy cannot be achieved despite the transfer of multiple suitable embryos, the treatment records and embryology results should be reviewed in detail.

The correct approach is not to apply every test and additional treatment to every patient. Actual risk factors should be identified, and the need for intrauterine assessment, PGT, hormonal regulation, sperm testing, or surgery should be determined individually.

Frequently Asked Questions

Why does an embryo fail to implant in the uterus?

One of the most common causes is that the embryo is chromosomally unsuitable. Intrauterine problems, hormonal timing, sperm-related factors, and transfer-related factors may also play a role.

Why might a high-quality embryo fail to implant?

The embryo’s appearance under the microscope does not definitively indicate its genetic structure. The intrauterine environment and hormonal preparation are also important.

Is failure of the first IVF attempt normal?

Yes. Failure of the first transfer is common and does not mean that pregnancy will not occur in the future.

Why does pregnancy not occur after embryo transfer?

The embryo’s genetic structure, the endometrium, progesterone support, intrauterine problems, sperm-related factors, and transfer technique may all have an effect.

Is endometrial thickness important?

Yes. However, not only thickness but also the structure of the endometrium and its preparation in harmony with progesterone are important.

Is bed rest necessary after embryo transfer?

Prolonged bed rest is not necessary for most patients. Unless the physician recommends otherwise, light daily activities may be continued.