Definition & Pronunciation
Infertility may be primary, meaning no pregnancy has previously been achieved, or secondary, meaning difficulty achieving another pregnancy after at least one previous pregnancy. Sometimes testing does not identify a definite cause; this is called unexplained infertility.
The World Health Organization classifies infertility as a condition of the male or femalereproductive system. Infertility can affect individuals and couples of different genders, identities, relationship types, and sexual orientations.
Note: Subfertility often suggests reduced fertility rather than a complete inability to achieve pregnancy, so it is not always an exact equivalent.
Note: Fertility describes the capacity to reproduce, but fertility exists on a range rather than as a simple opposite state.
Easy Explanation
Pregnancy depends on several steps. An egg must develop and be released, sperm must reach and fertilize it, and the resulting embryo must travel to and implant in the uterus. A problem at any step may contribute to infertility.
Simple examples include:
- Infertility may involve sperm, eggs, hormones, or reproductive organs.
- Infertility can affect either member of a couple.
- A person may experience infertility after having a previous pregnancy.
- Sometimes the cause of infertility remains unexplained.
- Treatment for infertility depends on the cause and the person’s goals.
Infertility is not proof that someone is unhealthy, sexually inexperienced, less masculine, less feminine, or unable to have a family.
Grammatical Formation and Usage
- The couple sought care for infertility.
- Infertility may have several causes.
- She discussed infertility with a specialist.
Do not normally say an infertility. Use:
- a cause of infertility;
- an infertility diagnosis;
- a case involving infertility;
- an infertility evaluation.
The adjective is infertile:
- an infertile person;
- an infertile couple;
- infertile soil.
Because infertile may sound absolute or stigmatizing when applied directly to a person, expressions such as a person experiencing infertility are often more sensitive.
Common Usage Patterns
The term commonly appears in phrases such as:
- experience infertility;
- causes of infertility;
- infertility testing;
- infertility treatment;
- primary infertility;
- secondary infertility;
- unexplained infertility;
- male-factor infertility;
- female-factor infertility;
- infertility counseling.
Primary and Secondary Infertility
Secondary infertility means difficulty achieving another pregnancy after a previous pregnancy. The earlier pregnancy may have resulted in birth, miscarriage, abortion, or ectopic pregnancy.
Secondary infertility may be unexpected because someone may assume that a previous conception guarantees future fertility. However, age, health conditions, infections, surgery, sperm quality, ovulation, and other factors may change over time.
Both primary and secondary infertility deserve appropriate evaluation and support.
Factors Affecting Ovulation and Eggs
Ovulation may be affected by:
- polycystic ovary syndrome;
- thyroid conditions;
- unusually high prolactin levels;
- reduced ovarian reserve;
- premature ovarian insufficiency;
- major weight changes;
- severe physical stress;
- some medications;
- age-related changes.
Egg number and quality generally decline with age, especially during the later reproductive years. However, age does not predict one individual’s fertility with certainty.
Regular menstrual periods often suggest that ovulation is occurring, but they do not guarantee fertility.
Factors Affecting Sperm
Possible contributing factors include:
- low sperm concentration;
- reduced sperm movement;
- abnormal sperm development;
- blockage of reproductive ducts;
- difficulties with ejaculation;
- testicular injury;
- varicocele;
- hormonal or genetic conditions;
- certain infections;
- chemotherapy or radiation;
- anabolic steroid use;
- smoking or heavy alcohol use.
One abnormal semen-analysis result does not always establish infertility. Sperm measurements can vary, and repeat testing may be necessary.
Fallopian Tubes, Uterus, and Pelvis
Tubal damage or blockage may result from:
- pelvic inflammatory disease;
- untreated chlamydia or gonorrhea;
- endometriosis;
- previous pelvic surgery;
- abdominal infection;
- prior ectopic pregnancy.
Conditions involving the uterus may also interfere with implantation or pregnancy. These may include certain fibroids, polyps, scar tissue, or congenital differences in uterine structure.
Endometriosis may affect fertility through inflammation, scar tissue, changes in pelvic anatomy, or effects on reproductive function.
Unexplained Infertility
This does not mean that the difficulty is imaginary or that nothing is affecting reproduction. Current tests cannot measure every detail of egg quality, sperm function, fertilization, embryo development, fallopian-tube activity, or implantation.
Treatment may still be available even when the cause remains uncertain.
Infertility and Sterility
Infertility usually means pregnancy has not occurred after a defined period of trying. It does not always mean conception is impossible.
Sterility generally suggests a complete inability to reproduce naturally, such as when both ovaries or testes have been removed or when reproductive pathways are permanently absent.
Because many people diagnosed with infertility later achieve pregnancy naturally or through treatment, the terms should not be used interchangeably.
Fertility Evaluation
It may involve:
- medical and sexual history;
- menstrual and ovulation assessment;
- semen analysis;
- hormone testing;
- pelvic ultrasound;
- testing whether the fallopian tubes are open;
- examination of the uterus;
- genetic testing in selected cases.
According to the Centers for Disease Control and Prevention, evaluation is generally considered after 12 months of trying when the person attempting pregnancy is younger than 35, after six months when aged 35 or older, and sooner in some situations.
Earlier evaluation may be appropriate when there are irregular or absent periods, known reproductive conditions, previous cancer treatment, repeated miscarriages, testicular injury, sexual-function difficulties, or other significant concerns.
Treatment and Fertility Care
Options may include:
- timing intercourse around ovulation;
- medication to support ovulation;
- treatment of hormonal or medical conditions;
- surgery for selected blockages or structural problems;
- intrauterine insemination;
- in vitro fertilization;
- intracytoplasmic sperm injection;
- donor sperm or eggs;
- gestational-carrier arrangements;
- fertility preservation;
- adoption or other family-building choices.
Not everyone wants or can access medical treatment. Choosing not to pursue treatment is also valid.
Success cannot be guaranteed, and some treatments require repeated procedures, significant expense, or difficult physical and emotional decisions.
Infertility and Sexual Relationships
Sex may begin to feel:
- scheduled;
- medically directed;
- connected to performance pressure;
- less spontaneous;
- emotionally stressful;
- focused only on pregnancy.
A person may experience reduced desire, erection difficulty, vaginal dryness, painful sex, anxiety, or conflict with a partner.
Supportive communication recognizes that neither partner is to blame. Couples may benefit from maintaining forms of affection and intimacy that are not centered entirely on conception.
Emotional and Social Effects
In some cultures, women are blamed automatically, even though infertility may involve male factors, female factors, combined factors, or unexplained causes.
Helpful support may include:
- counseling;
- peer-support groups;
- trusted family or friends;
- clear boundaries around personal questions;
- culturally sensitive fertility care;
- relationship counseling.
People should not be pressured to disclose infertility, pursue treatment, remain in a relationship, or accept unwanted advice.
Prevention and Risk Reduction
Some protective practices may include:
- preventing, testing for, and treating STIs;
- avoiding tobacco and anabolic steroids;
- limiting heavy alcohol use;
- using protective equipment around reproductive toxins;
- managing chronic health conditions;
- seeking care for severe pelvic or testicular pain;
- discussing fertility preservation before cancer treatment;
- receiving appropriate reproductive healthcare.
Contraception does not cause permanent infertility simply because it temporarily prevents pregnancy. Fertility usually returns after most contraceptive methods are discontinued, although timing varies.
Common Misunderstandings
It means pregnancy has not occurred after a defined period; conception may still happen naturally or through treatment.
Infertility is usually the woman’s fault.
It may involve male, female, combined, or unexplained factors.
A previous pregnancy proves future fertility.
Secondary infertility can occur after an earlier pregnancy.
Regular periods guarantee fertility.
Regular menstruation may suggest ovulation but does not confirm that every reproductive step is functioning.
Infertility means a person cannot have a family.
People may build families through treatment, donor reproduction, adoption, previous children, stepfamilies, or other paths.
Stress alone causes most infertility.
Stress may affect well-being and sexual function, but infertility should not be dismissed as simply psychological.
Sample Sentences
- Infertility is diagnosed when pregnancy is not achieved after a medically defined period of trying.
- Infertility may involve sperm, ovulation, fallopian tubes, hormones, or the uterus.
- Can infertility occur after someone has already had a child?
- The couple received testing to identify possible causes of infertility.
- Male factors may contribute to infertility.
- Unexplained infertility means that routine testing has not found a definite cause.
- Treatment for infertility may include medication, surgery, insemination, or IVF.
- Infertility can affect emotional well-being and sexual relationships.
- Experiencing infertility does not reduce a person’s masculinity, femininity, or worth.
- The counselor helped them discuss infertility without blaming each other.
Connection to Sexuality
However, fertility is not the same as sexuality. A person may be infertile and still experience attraction, arousal, orgasm, satisfying relationships, and a healthy sexual life. Infertility also does not determine gender identity or sexual orientation.
Accurate sexuality education helps people understand shared reproductive responsibility, seek appropriate testing without blame, separate fertility from personal worth, and make informed choices about treatment, intimacy, and family building.