When we talk about fertility, much of the focus is often on women. However, male fertility plays an equally important role in conception and can also decline with age.
Unlike women, who are born with a finite number of eggs, men produce sperm continuously throughout their lives. This means men can father children later in life, but the quality of sperm changes with age, impacting fertility and reproductive outcomes.
Let’s explore how male fertility changes over time, factors that influence it, and actionable steps men can take to optimise their reproductive health.
Men continue to produce sperm throughout their lives, but the quality of that sperm changes with age. Research shows:
Testosterone levels naturally decline as men age. This can lead to:
Summary on Male Fertility and Age
20–29: Peak sperm quality, highest motility and count. DNA fragmentation is minimal. Ideal age for conception.
30–39: Gradual decline in motility begins. Slightly increased DNA fragmentation risk.
40–49: Significant decline in sperm motility. Higher risk of DNA fragmentation and reduced chances of natural conception.
50+: Marked reductions in sperm quality. Increased time to conception and higher risks for offspring health.
Source: Pino et al, JBRA Assisted Reproduction, 2020
Yes. A study showed that the odds of fatherhood for men under 30 were 32%, compared to just 20% for men over 50—a nearly 40% decline. While men can father children later in life, older sperm are more likely to carry DNA damage, which may lead to complications such as miscarriage or developmental challenges.
While men can father children later in life, advanced paternal age comes with some increased risks:
Age isn’t the only factor affecting fertility. Health and lifestyle choices also play a significant role:
Contrary to the myth that abstinence "saves sperm," research shows that long periods of abstinence can lead to a build-up of older, less motile sperm. Having sex every 2–3 days is ideal for maintaining optimal sperm quality while replenishing sperm reserves. During the fertile window, if sperm is healthy, having intercourse every day gives you the best chance of success.
Certain health issues, such as diabetes, thyroid imbalances, and sexually transmitted infections (STIs), can impact sperm health. Regular health check-ups are essential, especially as you age.
If you’ve been trying to conceive for over a year (or six months if your partner is over 35), a semen analysis (included in Taylor's Couple's Fertility Screening) can provide insights into your sperm health. This test measures:
Additionally, hormone testing can evaluate testosterone and other levels to identify imbalances affecting sperm production.
If natural conception isn’t happening, assisted reproductive technologies (ART) like intrauterine insemination (IUI) or in vitro fertilisation (IVF) can help:
Male fertility may decline with age, but many factors influencing reproductive health can be managed through proactive steps. If you’re planning to start or expand your family, taking care of your health, addressing lifestyle factors, and seeking medical advice early can make a significant difference.
Fertility is a shared journey, and understanding how male age and health contribute to the process is key to making informed decisions. Whether through natural conception or assisted treatments, there are options to help you achieve your family-building goals.
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