What Affects Fertility in Men and Women? Key Factors to Understand
Fertility is influenced by a combination of biological, medical and lifestyle factors. It is not solely a women’s health concern. Difficulties conceiving may be linked to the female partner, the male partner, both partners, or no clearly identifiable cause. Understanding the possible influences can help couples recognise when it may be useful to seek professional guidance.
For couples with concerns about their reproductive health, fertility screening singapore may provide a clearer picture of possible contributing factors. An assessment is generally tailored to the individual or couple and may involve a review of medical history, menstrual patterns, previous pregnancies, lifestyle habits and relevant test results.
Age and Reproductive Changes
Age is an important influence on female fertility. Women are born with a finite number of eggs, and both egg quantity and quality decline over time. Although the rate differs between individuals, this change generally becomes more significant as a woman grows older.
Male fertility may also change with age. While men can continue producing sperm later in life, age may be associated with changes in sperm quality and reproductive function. Age does not automatically mean that conception will be difficult, but it is one factor that may be considered during an assessment.
Ovulation and Menstrual Health
Regular ovulation is necessary for natural conception. Conditions that interfere with the release of an egg can reduce the opportunity for fertilisation. Possible contributors include polycystic ovary syndrome, thyroid conditions, hormonal imbalances, significant weight changes and excessive physical strain.
Signs that may warrant discussion with a doctor include:
Very irregular or absent periods
Menstrual cycles that are consistently unusually short or long
Severe pelvic pain during menstruation
Unexpected bleeding between periods
Symptoms suggesting a hormonal concern
Irregular periods do not always indicate infertility. However, menstrual patterns can provide useful information when deciding whether further evaluation may be appropriate.
Structural and Gynaecological Factors
The female reproductive organs must allow an egg and sperm to meet while providing a suitable environment for implantation. Blocked or damaged fallopian tubes, endometriosis, uterine fibroids and certain congenital differences may affect this process. Previous pelvic infections or abdominal and pelvic surgery can also sometimes influence reproductive function.
These conditions vary considerably in severity. Some women may have no obvious symptoms, while others experience pelvic discomfort, heavy periods or pain during intimacy. The investigations recommended will depend on the person’s symptoms, age and medical history.
Sperm Health and Male Factors
Male fertility commonly involves the number, movement and shape of sperm, as well as the ability to produce and deliver sperm effectively. Reduced sperm quality may be associated with hormonal conditions, genetic factors, infections, injuries, varicoceles, certain medicines or previous medical treatments.
A semen analysis is often an important part of assessing male fertility. Depending on the findings, further evaluation may be recommended. Assessing both partners at the same time can support a more balanced approach and avoid placing responsibility for fertility concerns on one person.
Lifestyle and General Health
Lifestyle choices do not explain every fertility concern, and people with healthy habits may still experience difficulty conceiving. However, the World Health Organization identifies smoking, excessive alcohol consumption and obesity as factors that can affect fertility. Environmental pollutants and toxins may also affect the quantity or quality of eggs and sperm.
Areas that couples may consider reviewing include:
Stopping smoking and avoiding recreational drugs
Limiting alcohol consumption
Working towards a sustainable and healthy weight
Eating a balanced and varied diet
Managing long-term health conditions with medical guidance
Reviewing medicines and supplements with a healthcare professional
Reducing avoidable exposure to workplace or environmental toxins
Prescribed medicines should not be stopped or changed without first consulting the healthcare professional managing the condition.
When Should a Couple Consider an Assessment?
A fertility assessment may be considered when pregnancy has not occurred after a period of regular attempts. Earlier discussion may be appropriate when there are irregular menstrual cycles, known reproductive conditions, previous pelvic surgery, suspected male-factor concerns or a history of medical treatments that could affect fertility.
Professional guidelines generally recommend considering an evaluation after 12 months of trying when the woman is under 35, or after six months when she is 35 or older. More immediate evaluation may be appropriate when a known fertility-related condition is present.
Fertility tests cannot predict future pregnancy with certainty. Their purpose is to identify possible contributing factors, explain suitable options and support informed decisions based on each couple’s circumstances.
Seeking Personalised Fertility Guidance
Kierauniv International Clinic for Women provides fertility-related and women’s health consultations in Singapore. For those looking for a gynaecologist singapore clinic, the team can review relevant concerns, discuss whether further assessment may be appropriate and explain possible next steps based on individual circumstances. If you want to know more, contact their team to book a consultation and receive personalised guidance.
Disclaimer: This article is intended for general informational purposes only and reflects the views and opinions of the author from a non-clinical perspective. It does not constitute medical advice, diagnosis, or treatment, and it does not represent the views of a licensed medical professional. Medical information may vary depending on individual circumstances. Readers are advised to consult a qualified healthcare provider for personalised medical advice.
