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The Role of Age in Conception: What to Expect in Your 20s, 30s, and 40s

Written by healthwords.ai's team of doctors and pharmacists based in UK | Updated: 02 Jul 2025 | 4 min read

Age is an important factor in fertility for both men and women. As people get older, it usually becomes harder to have a baby. Knowing how fertility changes in your 20s, 30s, and 40s can help you make better choices about starting a family. Other things like your health, lifestyle, and genetics also matter, but age is a big part of the picture.

Impact of age on fertility

Fertility in Your 20s

  • The 20s are the best years for fertility. Women have lots of healthy eggs, and men usually have strong sperm.

  • It’s easier to get pregnant in your 20s, but healthy habits are still important.

  • Eating well, exercising, and managing stress help your body stay ready for pregnancy.

  • Even if you don’t want kids right now, taking care of your health can help you later.

  • Tips:

    • Eat a balanced diet with fruits, vegetables, whole grains, and lean meats.

    • Start taking prenatal vitamins like folic acid before you try to get pregnant.

    • Manage stress with activities like walking or meditation.

    • Think about your family goals and make a plan.

Fertility in Your 30s

  • Fertility is still good in your early 30s, but it starts to slowly go down.

  • After age 35, women’s egg quality and number drop faster. Men’s sperm quality also slowly changes.

  • It might take longer to get pregnant, and the risk of miscarriage or genetic problems goes up after 35.

  • Many people still have healthy babies in their 30s.

  • Tips:

    • If you haven’t gotten pregnant after 6 months to a year of trying, talk to a doctor.

    • Take fertility-supporting vitamins like folic acid, CoQ10, and antioxidants.

    • Use apps or kits to track your ovulation and find your most fertile days.

    • Keep up healthy habits like eating well, exercising, and sleeping enough.

Fertility in Your 40s

  • Fertility drops a lot in your 40s. Women have fewer good eggs, and men’s sperm quality goes down.

  • It’s harder to get pregnant, and there is a higher risk of miscarriage or genetic problems.

  • Some people still have babies in their 40s, sometimes with help from treatments like in vitro fertilization IVF) or using donor eggs or sperm.

  • Tips:

    • Eat a diet rich in antioxidants, healthy fats, and vitamins (like folic acid, vitamin D, and zinc).

    • Do regular, gentle exercise like walking, swimming, or yoga.

    • Manage stress with relaxation techniques or mindfulness.

    • Take fertility-supporting supplements like CoQ10 and omega-3s.

    • See a fertility doctor early for advice and possible treatments.

Male fertility and age

  • Men’s fertility doesn’t drop as quickly as women’s, but sperm quality gets worse after age 40.

  • Sperm count and movement go down, and there may be more DNA problems.

  • Men can still father children in their 40s and beyond, especially if they stay healthy.

  • Tips:

    • Eat foods with zinc, selenium, vitamin C, and vitamin E (like nuts, seeds, fruits, and veggies).

    • Exercise regularly but don’t overdo it.

    • Avoid smoking and limit alcohol.

    • Stay away from toxins like pesticides and heavy metals.

    • Take supplements like CoQ10, zinc, and omega-3s if needed.

    • If you haven’t conceived after a year (or 6 months if your partner is over 35), get a semen analysis.

General tips for all ages

Regardless of age, individuals and couples can take proactive steps to enhance their chances of conception and prepare for a healthy pregnancy.

  • Eat a healthy, balanced diet and maintain a healthy weight.

  • Avoid harmful substances like smoking, too much alcohol, and environmental toxins.

  • Track your menstrual cycle and ovulation to know your most fertile days.

  • Consider taking fertility supplements if your doctor recommends them.

  • If you have trouble getting pregnant, talk to a healthcare provider for tests or treatment

Frequently asked questions

In this final section, we’ll address some common questions and concerns about how age affects fertility, providing quick, accessible answers to help readers better understand their reproductive health.

  • Does age really matter for fertility?
    Yes, especially for women. Fertility drops after 35 for women and after 40 for men, but healthy habits can help at any age.

  • Can lifestyle changes help?
    Yes. Eating well, exercising, and managing stress can improve your chances of getting pregnant.

  • What treatments are there for older people?
    IVF and using donor eggs or sperm are common options for people in their late 30s and 40s.

  • Can men’s age affect fertility?
    Yes, but usually not as quickly as women’s. Sperm quality goes down after 40.

  • Are there tests for fertility?
    Yes, women can get hormone tests, and men can get semen analysis to check sperm health.

  • Is it too late to have a baby in your 40s?
    It’s harder, but not impossible. Many people use fertility treatments to help.

Staying healthy and talking to your doctor can help you have the best chance of having a baby, no matter your age.

This article has been written by UK-based doctors and pharmacists, so some advice may not apply to US users and some suggested treatments may not be available. For more information, please see our T&Cs.