Investigating and managing infertility in general practiceBMJ 1998; 316 doi: https://doi.org/10.1136/bmj.316.7142.1438 (Published 09 May 1998) Cite this as: BMJ 1998;316:1438
- a Department of Urology, Western General Hospital, Edinburgh EH4 2XU
- b Ninewells Hospital and Medical School, Dundee DD1 9SY
- Correspondence to: Mr Hargreave
The introduction of techniques for treating infertility have given real hope to those who have been unable to have children. It is therefore prudent to review our management of these patients, to be aware of the likelihood of success and to carry out only those investigations and treatments that are likely to be of benefit.
Investigation of infertility should include both partners, and ideally the same general practitioner should be involved with each partner
It is good practice to consider the welfare of the future child as well as the needs of the couple
Duration of infertility and age of female partner are the most important factors when making a prognosis for treatment
Early referral for specialist assessment is indicated if there is a specific problem or when the female partner is aged over 35 years
Semen analysis should be carried out in all cases, and if the result is abnormal it should be repeated
General advice should be given to all couples on, for example, folic acid supplements, rubella immunity, and stopping smoking
For this review, we made extensive use of background material from a major consultation process commissioned by the European Society for Human Reproduction, in which TBH was involved,1 and also used the review of effective health care itself.1 We have both worked for more than 10 years in the field, and we used our experience to include those aspects of infertility practice relevant to general practitioners and primary care physicians.
When to refer for specialist assessment
If a couple have not conceived within three years of stopping contraception then the chance of a spontaneous (treatment independent) pregnancy in the next year is not more than 25% irrespective of the results of semen analysis (table 1), and it is therefore appropriate to refer them to a specialist clinic. If the female partner is aged over 35 years there is a substantial fall in the chance of success with in vitro fertilisation.5 Since it takes time to complete the investigations necessary before in vitro fertilisation, it is appropriate to refer a couple immediately when the female partner is aged over 35 and the couple have been attempting conception for more than a year. Other patients who should be referred early to a specialist clinic include those with amenorrhoea or gross menstrual irregularity and those with a history of significant pelvic inflammation.
The female partner
Clinical examination may reveal vaginal infection, which should obviously be treated, and it is worth bearing in mind that any form of ablative treatment for abnormal cervical smears may result in cervical stenosis. Bimanual examination may reveal fibroids or an ovarian cyst, and tenderness may indicate endometriosis. Polycystic ovarian syndrome may be associated with hirsutism and acne. Galactorrhoea with menstrual irregularity suggests hyperprolactinaemia.
The male partner
Men with abnormal semen analysis should be examined. Phimosis and balanitis can cause an infected ejaculate and may interfere with in vitro fertilisation, and circumcision is indicated. It is useful to note testicular size and consistency. Small soft testicles indicate damage to spermatogenesis. Any hard lump within the body of the testis should raise the possibility of a testicular tumour. It is important to remember the association between infertility, maldescended testes, and testicular tumour6 and that testicular tumour, although rare, is the commonest malignancy in men aged 15-45. Varicoceles will be found in about 25% of men seeking assessment for infertility, and there is conflicting evidence about the efficacy of treatment.7 For men aged over 30, the fertility benefits of treatment are minimal.
Investigations in general practice
The female partner
Ovulation —The most common problem is irregularity of ovulation. This is often seen in the first few months after stopping oral contraception and requires no treatment. Simple problems with ovulation can be treated in general practice (fig 1). For those anovulatory patients who are referred, it is helpful to send blood samples to measure concentrations of follicle stimulating hormone, luteinising hormone, prolactin, oestradiol, and testosterone (table 2).
Rubella —It is traditional to check the patient's rubella status. For those who require immunisation the Department of Health currently advises avoidance of pregnancy for one month after immunisation.8
The male partner
Seminal analysis —It is sufficient in general practice to note the sperm concentration and motility and volume of ejaculate. It is best to use a laboratory service that participates in the British quality control scheme (NEQAS). A source of confusion is the normal values for semen measurements published by World Health Organisation (≥20 million sperm/ml and 60% progressive motility); these are derived by comparing results from normal and infertile populations, but they do not give good information about prognosis (table 1). If the results of the first semen analysis are poor then it is worth repeating. If no sperm are seen then referral is indicated. Careful physical examination of men with a low volume azoospermic ejaculate may reveal an absence of the vas deferens, which is associated with carrier status for cystic fibrosis.
Chlamydia trachomatis —Infection can now be diagnosed from a first void urine sample in both sexes.9
Folic acid —All women should be encouraged to take prophylactic folic acid while trying for pregnancy and during the first 12 weeks in order to reduce the risk of spina bifida in the baby.
Smoking —Both partners should be encouraged to give up smoking to reduce risk during early pregnancy. There is evidence that smoking reduces fertility.10
Prescribed drugs —A detailed drug history should be taken. Drugs best avoided by men include sulphasalazine (use 5-aminosalicylic acid),11 nitrofurantoin, tetracycline, and colchicine. Cancer chemotherapy is likely to damage spermatogenesis, and sperm banking should be offered before treatment is started.
Misuse of drugs —There is a well documented association between male infertility and the use of anabolic steroids by body builders. This is usually reversible once self medication is stopped. Alcoholic men with cirrhosis have fertility problems, but there is little evidence of any substantial fertility problem associated with misuse of cocaine or marihuana.
Obesity —Pregnancy rates are reduced in women who are obese, and weight reduction should be advised for all women with a body mass index greater than 30.12
Scrotal temperature —Showers and sauna baths do not increase the intrascrotal temperature, but soaking in a hot bath should be avoided by men.13
Frequency and timing of intercourse —There is no evidence that attempts to time intercourse in the menstrual cycle will result in improved conception rates, and it is stressful.14 Couples should continue their normal sexual habit and not to resort to the use of temperature charts or kits for detecting luteinising hormone in the urine.
Specialist centre investigation and treatments
Oligomenorrhoea or amenorrhoea
Patients can be treated with appropriate drugs and will achieve pregnancy at the same rate as normally fertile women, unless the basis for anovulation is that of ovarian failure such as premature menopause or gonadal dysgenesis (fig 1). Commonly used treatments include dopamine agonists for hyperprolactinaemia (fig 2), clomiphene, follicle stimulating hormone, and ovarian diathermy for polycystic ovarian syndrome (fig 3). The rarer case of pituitary failure can be treated successfully with replacement of follicle stimulating hormone or with gonadotrophin releasing hormone.
Assessment of fallopian tube patency
Tubal patency is best assessed by laparoscopy and dye hydrotubation: this allows visualisation not only of the tubes but also of the ovaries and will reveal any pelvic adhesion or endometriosis. Hysterosalpingography is a useful alternative, particularly for those for whom laparoscopy is contraindicated. For couples who will require in vitro fertilisation or intracytoplasmic sperm injection because of male infertility, there is generally no need to test fallopian tube patency.
Surgery for female infertility
The advent of assisted conception has altered the indications for surgical procedures, and these are much less commonly performed. Surgery is still indicated in some cases of endometriosis and to divide adhesions.
In vitro fertilisation was initially used to overcome infertility associated with fallopian tube occlusion, and now it has replaced most fallopian tube surgery. More recently, it was realised that, by placing sperm close to egg, in vitro fertilisation is an effective treatment for male infertility associated with reduced number of motile sperm. This has led to the development of effective treatments for extreme oligozoospermia by recovery of sperm from the epididymis (percutaneous epididymal sperm aspiration) and testicle (testicular sperm aspiration) and direct injection of a single sperm into the egg (intracytoplasmic sperm injection).
The success rate of in vitro fertilisation and intracytoplasmic sperm injection exceeds that of normal conception in a fertile couple in a month. The likelihood of pregnancy for a particular couple using assisted conception depends greatly on the woman's age and the duration of infertility5; it may range from 8% to 25% for each treatment cycle started, but it is worth bearing in mind that some treatment cycles will be abandoned because of poor response to stimulation. If a couple have an opportunity for three treatment cycles then the cumulative pregnancy rate will reach 50%,15 and couples should be encouraged to plan for three cycles of treatment.
It is customary to transfer more than one embryo to the uterus to increase the chance of at least one embryo implanting; the risk of multiple pregnancies must be balanced with the chance of achieving a pregnancy at all (fig 4). It is not appropriate to replace more than two embryos in women under the age of 37. High multiple pregnancies are much more likely to be the result of inappropriate ovulation induction in polycystic ovarian syndrome than they are of in vitro fertilisation and embryo transfer.
Complications —Ovarian hyperstimulation syndrome is the most common complication of assisted conception and occurs in 3-5% of treatment cycles (fig 5). This may present in a mild case as lower abdominal discomfort and distension with some nausea, or in a more severe case with quite marked abdominal pain, abdominal distension, ascites, pleural effusion, and even venous thrombotic episodes. Treatment in a specialist unit is appropriate, and any unit offering ovulation induction or assisted conception should ensure that information leaflets are given to the patients and their general practitioners to cover this problem.
Risks to the child —Recent analysis of births after intracytoplasmic sperm injection suggest that there may be a small rise in congenital abnormalities,16 but this is controversial. There is a small increase in the frequency of abnormalities in sex chromosomes in babies conceived with this technique. There is also evidence that 0-20% of men with greatly reduced sperm counts may have microdeletions on the long arm of the Y chromosome, and it is likely that these will be passed on to any sons born as a result of these techniques and that these sons may in turn have impaired fertility.17
Reversal of sterilisation
Successful reversal of vasectomy or of tubal ligation may be anticipated in 50-60% of cases provided that the partner's fertility is normal. If the partner also has problems then assisted conception will almost certainly be more cost effective.
The number of couples seeking donor insemination is falling as they turn to intracytoplasmic sperm injection to try to have their own child. Donor oocytes may be used with in vitro fertilisation to enable women with ovarian failure to bear a child. This can be appropriate for women with gonadal dysgenesis, a premature menopause, or iatrogenic ovarian failure after chemotherapy or radiotherapy for malignancy.
The role of surrogacy is currently being reviewed. In the United Kingdom it is illegal to enter into any commercial surrogacy arrangement.