Polycystic ovary syndrome (PCOS) is a disorder affecting women of reproductive age, characterized by elevated levels of male hormones (androgens). The name is derived from the presence of cysts surrounding the ovum, which cause enlargement of the ovaries. Its cause remains unknown. There is speculation that high androgen levels could affect brain development in the fetus.
A team of Iranian researchers (Maleki et al.) published a twofold meta-analysis earlier this year exploring the relationship between PCOS and offspring ADHD. A systematic search of the peer-reviewed medical literature came up with six studies, consisting of three cohort studies, and three case-control studies.
A meta-analysis of the three case-control studies with a combined total of 79,978 participants found that children of mothers with PCOS were 42 percent more likely to develop ADHD.
A separate meta-analysis of the three cohort studies with a combined total of 325,435 participants produced essentially identical outcomes: children of mothers with PCOS were 43 percent more likely to develop ADHD.
There was no indication of publication bias in either meta-analysis and virtually no heterogeneity. Except for one case-control study, all studies were considered to be of high quality.
The authors concluded, “Our study showed that maternal PCOS is a risk factor for ADHD. Therefore, Screening for ADHD among children of these women should be considered as part of the comprehensive clinical care for women with PCOS.”
More recently, a second-team (Dubey et al.), based in Texas, published a meta-analysis on the same subject. Their systematic search produced the same studies, but classified one study described as case-control by Malekiet al. as a cohort study.
Their meta-analysis of four cohort studies with a combined total of over two million participants (they counted participants differently than Maleki et al.) found that children of mothers with PCOS were 43 percent more likely to develop ADHD. Adjusting for confounders made no difference.
Again, there was no indication of publication bias, and between-study heterogeneity was virtually nil.
Considering they relied on the same studies, the fact that both teams reported identical outcomes is unsurprising, confirming there's a clear association between maternal PCOS and ADHD in offspring.
Pallavi Dubey, Bhaskar Thakur, Sheryl Rodriguez, JessikaCox, Sheralyn Sanchez, Anacani Fonseca, Sireesha Reddy, Deborah Clegg, and Alok Kumar Dwivedi, “A systematic review and meta-analysis of the association between maternal polycystic ovary syndrome and neuropsychiatric disorders in children” TranslationalPsychiatry (2021), 11:569, published online,https://doi.org/10.1038/s41398-021-01699-8.