Infertility: A practical framework

LOOK FOR CLUES

Before embarking on a series of tests, the primary care physician can carefully evaluate for clues that may guide the diagnostic evaluation. The approach can be individualized based on the patient’s age, duration of subfertility (ie, how long they have been trying to become pregnant), and risk factors. But as a general rule, regardless of age, couples who have been trying to conceive for more than 1 year should be encouraged to pursue additional testing.

Because each month presents a new cycle of hope (often followed by intense disappointment), the prevailing sentiment to “just give it a little more time” must be countered by education and counseling. The primary care physician must increase awareness that lack of pregnancy in the stated time periods is a compelling reason for evaluation.

History-taking in the infertile couple should include a complete gynecologic and menstrual history. A history of sexually transmitted diseases that can cause tubal disease, such as gonorrhea and Chlamydia, is significant. Both partners should be assessed for a history of prior conceptions, past medical or surgical problems, medications, and exposures to environmental toxins including alcohol, tobacco, and drugs.

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A detailed physical examination can provide clues to the cause of subfertility, especially if signs of obesity, androgen excess, or insulin resistance are present.

QUESTIONS OFTEN ASKED BY COUPLES TRYING TO CONCEIVE

Clinicians are frequently asked questions related to sexual practices and lifestyle in relation to fertility and should be comfortable responding to questions in these areas.

Does frequent ejaculation ‘use up’ my sperm?

Men should be reassured that frequent ejaculations do not decrease sperm counts; even daily ejaculation does not deplete the concentration of sperm. Male partners can be reassured that “saving up” is not an effective strategy; in fact, abstinence periods of greater than 5 days can adversely affect semen parameters.¹²

How often should we have sex?

Infrequent intercourse (< 1 time per week) reduces the monthly chance of conceiving.¹³ There does not seem to be a significant improvement in fecundity with daily intercourse vs intercourse on alternate days. Strict schedules surrounding intercourse may increase stress, and reassurance should be offered that intercourse need not be regimented. Every 1 to 2 days should suffice.

Are any sexual positions better for conception?

There is no evidence that particular coital positioning or remaining supine after intercourse improves fertility. Sperm can be found within the endocervix within seconds of ejaculation, irrespective of sexual position.

What is the window of fertility?

There is good evidence that the fertile window lasts approximately 6 days and closes after ovulation.^13,14 Women with regular cycles can determine their typical day of ovulation based on menstrual tracking. Intercourse should begin about 6 days before ovulation and should continue every 1 to 2 days for 1 week to fully capture this window.

Should we change our lifestyle?

Couples seeking pregnancy should be advised to limit alcohol and caffeine use, completely abstain from cigarette smoking or illicit drug use, and maintain a healthy body mass index.

Very few data exist to support particular diets or supplements to promote fertility, including antioxidants and herbal remedies. Folic acid supplementation is recommended in all women attempting to conceive to reduce the incidence of birth defects.

Do lubricants reduce fertility?

Although there seem to be no differences in fecundity rates in couples using commercial lubricants, most water-based lubricants are best avoided in couples with infertility, as adverse effects on sperm have been demonstrated in vitro.¹⁵ If lubrication is needed, couples may try mineral oil, canola oil, or hydroxyetyl­cellulose-based lubricants (eg, Pre-seed).

Do fertility trackers work?

Many couples with primary infertility perceive that coital timing is critical and worry that their infertility is due to poorly timed intercourse; in fact, this is seldom the case.

Despite widespread marketing of urinary luteinizing hormone (LH) detection kits and electronic trackers and monitors, there is no clear evidence that these methods improve monthly rates of conception.

Women with a regular menstrual cycle should be encouraged to take notice when their cervical mucus appears clear and slippery (a sign of ovulation). Not all women are able to detect these fluctuations; however, for those who can, observing cervical mucus changes appears to be equivalent or superior to predictor kits in predicting conception.¹⁶

A PRACTICAL FRAMEWORK FOR EVALUATING THE INFERTILE COUPLE

To assess for the common factors identified in Table 1, the essential investigation of the infertile couple includes:

• Semen analysis
• Confirmation of ovulation
• Hysterosalpingography.

Consideration can also be given to ovarian reserve testing in women at risk of diminished ovarian reserve. The above investigation can be performed simultaneously to allow for prompt identification of any issues. Further, infertility is often a combination of problems (eg, anovulation in the woman together with a problem in the man), so an incomplete evaluation may overlook a coexisting diagnosis and lead to delays in treatment and pregnancy.

Although abnormal results from this screening will likely prompt referral to a fertility specialist, most patients seeking management from their primary care physician simply want assessment and education.

Tests that are no longer typically used in clinical practice are outlined in Table 2.