Is infertility associated with childhood autism?

K et al. tracked 1,600 moms who had fertility treatment. They asked if those moms later had a child with autism.

They split the kids into two groups: single births and twins-or-more. Then they compared autism rates to moms with no fertility history.

For single babies, infertility treatment made no difference. Autism rates were the same as the general pool.

For twins or triplets, the numbers looked higher, but only the kids were in that group. The team said the signal is too weak to trust.

Lyall et al. (2011) also looked at mom factors. They found early periods and teen weight mattered, but not infertility. Both studies agree most reproductive clues wash out.

Aller et al. (2023) took a different angle. They linked moms with PCOS and high testosterone to more autism traits. PCOS often causes infertility, so the new study may have missed this subgroup by lumping all fertility patients together.

Granieri et al. (2020) used the same registry trick. They killed the old worry about smoking while pregnant. K et al. do the same for infertility: once you control family background, the risk disappears.

You can reassure families using IVF or IUI. Single births show no extra autism risk. When parents ask, show them the data and lower their stress. Keep watching twins, but don’t panic—the evidence is still thin.