Cognitive and behavioural outcome of children born after IVF at age 9

Cognitive and behavioural outcome of children born after IVF at age 9

Some reassuring research was published last month involving the long term cognitive and behavioural outcomes of children conceived by ART.

Studies have already reassured us that IVF babies not only reach almost identical developmental milestones as babies conceived naturally, but a Dutch study also found that there was no increased risk of childhood cancer in children conceived through Assisted Reproductive Technology (ART). But what about cognitive development long term? Does IVF affect the cognitive and behavioural development of children at say, 9 years?

The short answer is no, there was no association between IVF conceived children at 9 years. A study conducted in the Netherlands looked at the effects of ovarian stimulation and IVF on the cognitive and behavioural outcome of children at 9 years of age in an aim to distinguish if there’s any detrimental association.

To assess the cognitive outcome, the research team used a condensed IQ test known as the Wechsler Abbreviated Scale of Intelligence (WASI) which looks at verbal, performance and full scale, and to evaluate the behavioural outcome, the Child Behaviour Checklist (CBCL) and Teachers Report Form (TRF) were used.

The study found there was no difference in IQ between the ART group and the naturally conceived group and when observing the time taken to conceive, there was no association between the length of time and adverse behavioural outcomes. These results are incredibly reassuring to not only the parents involved with ART, but also the clinicians involved with the process who have dedicated their careers and lives to helping people start families all over the world.

Although there will always be more research that need to be done, the findings so far should provide some peace of mind to parents, future parents and IVF clinical staff who are involved with the ART industry.

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FAQs about improving natural fertility

Will stress affect my ability to get pregnant?

Yes, chronic stress can impact fertility by disrupting hormonal balance and ovulation patterns. Managing stress through relaxation techniques, regular exercise, adequate sleep, and mindfulness practices may help optimise your chances of conception. Consider speaking with a counsellor if stress feels overwhelming.

How does my partner's health affect our fertility?

Sperm health accounts for about 40% of conception challenges. Your partner can improve sperm health by maintaining a healthy weight, avoiding excessive heat exposure (hot tubs, saunas, tight clothing), limiting alcohol, quitting smoking, managing stress, and taking a multivitamin with antioxidants. Sperm takes about 3 months to develop, so lifestyle changes need time to show results.

When during my cycle am I most fertile?

Your fertile window typically spans 5-6 days, ending on ovulation day. For a regular 28-day cycle, this usually falls between days 10-15, with peak fertility 1-2 days before ovulation. Track your cycle using ovulation predictor kits, basal body temperature, or cervical mucus changes to identify your unique pattern. Having intercourse every 1-2 days during this window optimises your chances.