Trajectories of diurnal cortisol in mothers of children with autism and other developmental disabilities: relations to health and mental health.

The team tracked moms of kids with autism or other delays for two years. They took saliva four times a day to map each mom’s daily cortisol slope.

They also asked about stress, mood, and health every six months. The goal was to see if different stress patterns show up in the hormone data.

Two clear cortisol tracks appeared. Thirty-seven percent of moms had the normal dip from morning to night. Sixty-three percent showed a flat, blunted curve.

The flat-curve moms scored higher on parenting stress and reported more illnesses. Their stress hormone system looked worn out.

Fucà et al. (2025) also found moms under pressure, but in Down syndrome. The two studies seem to clash—who is most stressed? The answer is both groups are, yet the driver is the child’s diagnosis, not the moms themselves.

Takahashi et al. (2023) widened the lens to Chinese moms of kids with ID. They linked high stress to harsher parenting styles, extending the target finding that stress shows up in biology and behavior.

Northup et al. (1991) showed social support protects autism moms’ mental health. Capio et al. (2013) now adds a body-stress marker, giving you two levers: boost support and check cortisol.

You can’t fix what you don’t measure. A quick saliva kit at intake can flag the moms whose stress systems are already maxed out. Pair those data with brief stress surveys and you will know who needs parent training first, who needs respite, and who may benefit from medical referral before burnout hits.