A child may face an increased risk of developing asthma if your mother experiences depression during pregnancy, even more so if they're taking antidepressants. This is what a recent study conducted at Aarhus University in Denmark suggests.
However, more than 80% of the women observed in the study who took antidepressants from a new class of drugs known as selective serotonin reuptake inhibitors (SSRIs) They didn't show an increased risk of asthma in the child. I'll tell you all about this study below.
«How maternal depression affects the risk of asthma in children is unknown, but the mechanism could involve hormonal changes or changes in the lifestyles«, said the study's lead author, Dr. Xiaoqing Liu. «The most important finding of our study is that we found that the use of antidepressants during pregnancy does not increase the risk of asthma in general.»
However, the question is different when the researchers looked only at the older antidepressants, known as antidepressants tricyclics. They found that these drugs were linked to the same level of increased risk for asthma as depression during pregnancy, according to the researchers. In the study, approximately 8% of the women took the older medications.
The Depression affects between 7 and 13% of pregnant women, according to background information in the study, and the use of antidepressants during pregnancy has increased in recent years. SSRIs are the most commonly prescribed medications for depression.
Liu and his team analyzed the medical records of more than 733.000 children Danes born over a period of more than a decade. More than 21.000 of mothers either had a diagnosis of depression or received a prescription for antidepressants while pregnant.
Children born to mothers with depression were a 25% more likely to develop childhood asthma, according to the results of the study.
Among the almost 9.000 children whose mothers were prescribed antidepressants during pregnancy, the children of women who received the older antidepressants had a 26% higher risk of suffering from asthma.
The study does not prove that older antidepressants caused the risk of asthma to increase, only that there was a association between the two. The researchers noted that tricyclic antidepressants are prescribed for more severe depression, which had already been linked to asthma in previous research. Furthermore, the study only found an association between depression and asthma risk, No. a relationship of cause effect.
«Tricyclic antidepressants have different pharmacokinetic properties than SSRIs, but the association may be confounded by the underlying severity of depression.Liu said.
In other words, it could be that the reason for the increased risk of asthma is that mothers who take tricyclic antidepressants already have more severe depression and that it is depression, not drugs, that contributes to the risk of asthma.
It is unclear, however, how maternal depression might contribute to a child's asthma risk. The link may be partly explained by the biology, with something that happens during pregnancy, through the participation of environmental factors o genetic, or all three, Liu explained.
«Researchers also found that depression in parents slightly increases the risk of asthma, suggesting that some kind of environmental or genetic factors "children could be involved"Liu said.
Dr. Jill rabin, an obstetrician and gynecologist at Health Services at North Shore-LIJ Health System in New Hyde Park, New York, commented, regarding this study, that any good study raises more questions what answers.
"If you have a parent who is depressed, is that the home environment "Do you have disputes that affect the whole family?"Rabin asked. "Is it that the socio-emotional tone of the house is affecting the baby's respiratory health? Could it be that the parents in this house who are depressed are Smoking?»
The study authors adjusted their results to account for mothers who smoked during pregnancy, but did not take into account whether the fathers smoked or other sources of smoke. «Smoking during pregnancy influences the baby's lung development", Rabin noted.
However, despite these rebuttals, Rabin also said that the study's findings should not change any woman's decision to treat depression During pregnancy.
"This study raises some interesting questions that warrant further study, but there is no evidence that antidepressants cause asthma.", Dijo. "We want women to have their depression treated so they can work better for them, their families and their newborns.»
The results of this study have been published en Pediatrics
.
What other population cohort research adds
The latest evidence strengthens the link between maternal psychological distress during pregnancy and infant respiratory health. Prospective research in a large European cohort (Generation R Study) observed that general anguish of the mother, as well as symptoms of anxiety and depression, were associated with an increase in 45% a 92% on the risk of asthma in offspring upon reaching advanced school age, after adjusting for age, ethnic origin, Smoking during pregnancy and living with Pets.
In this work, the distress of each parent was measured with a validated 53-item questionnaire during the second trimester of pregnancy and was reassessed at several times postpartum. Lung function information was also collected using spirometry: Children of mothers with a higher symptom burden had lower values ​​of GCF y FEV1, key indicators of respiratory performance.
A relevant fact is that the paternal psychological distress during pregnancy did not modify the association detected for mothers, suggesting a possible intrauterine effect rather than a purely social or unmeasured environmental explanation. However, family environment variables remain important for the child's respiratory phenotype.
These results are observational and therefore do not establish causality. However, the consistency of the findings with other studies reinforces the hypothesis that the fetus could be sensitive to biological signals of maternal stress that program their respiratory development.
Possible biological mechanisms explaining the association
There are explanations biologically plausible for the link between maternal depression/anxiety and childhood asthma. The activation of the hypothalamic-pituitary-adrenal axis during stress increases the production of glucocorticoids, key hormones for fetal lung development. Sustained imbalances can alter airway maturation processes, immune response and inflammatory mechanisms.
In addition to stress hormones, depression can influence health behaviors (nutrition, physical activity, indoor breathing, adherence to prenatal care) that indirectly impact the baby's respiratory development. The interaction between genetics, environment and maternal emotional state are probably multifactorial and dynamic throughout pregnancy and postpartum.
The findings of lower FVC and FEV1 in children of mothers with greater distress suggest that not only is the diagnostic risk of asthma, but there could be a baseline lung function somewhat more limited, a trait that, combined with other factors (allergens, respiratory infections), could translate into more symptoms.
In parallel, it is reasonable to consider that some associations are influenced by residual confusion: unmeasured exposure to secondhand smoke, pollution, allergies family or socioeconomic differences. Therefore, the scientific community insists on analyzing multiple cohorts and carefully adjust for known risk factors.
Postpartum depression and duration of stress exposure
Several works have explored the role of postpartum depression and the sustained maternal stress in the first years of life. In a large population analysis in North America, children were classified according to the duration of exposure to depressive or anxiety disorders in their mothers: only in the first year of life, intermittent additional exposure, or exposure prolonged throughout early childhood.
La prevalence of asthma Childhood exposure grew with the duration of exposure: from values ​​around 7% when exposure was exclusive to the first year, to slightly higher figures when there were additional episodes, to almost 10% in cases of exposure to long term. After considering other risk factors, only exposure longer was independently associated with asthma, with an increased risk of about 25%.
These data support two ideas: on the one hand, the weight of the postnatal environment (interactions, family stress, habits) on the child's respiratory health; on the other hand, that the gestational window could play a particularly critical role, since intrauterine patterns appear to leave their mark even after adjusting for postnatal variables.
Smaller studies have also suggested that postpartum depression can act as a risk factor in children with genetic predisposition, a nuance that reinforces the need to consider the set of family factors in risk assessment.
Other risk factors and sex differences
Clinical research also incorporates classic risk factors for childhood asthma, such as maternal asthma, and nuances that are not always evident. In analysis of the pediatric population in Canada, nearly 10% of the children had asthma and, in addition to family history, an interesting finding emerged: being only son together with maternal depression was associated with a higher risk in girlsThis possible sex-family environment interaction effect deserves further study.
Another result worth highlighting is that the Childhood obesity did not show any association with the risk of asthma in either sex in that specific analysis, remembering that the determinants of asthma They are heterogeneous and vary according to population, time and context.
Antidepressant treatment during pregnancy: what we know and how to decide
Returning to the axis of the first study, the best available evidence indicates that the SSRIs used during pregnancy do not increase the overall risk of asthma in offspring, while the tricyclics could be associated with an increase similar to that of maternal depression itself. Since these drugs are usually prescribed in more serious cases, part of the effect could be due to the intensity of the disorder and not the medication itself.
In clinical practice, decisions must be personalized by assessing the benefit-risk balance: Untreated depression is associated with worse health habits, lower adherence to controls, higher risk of complicated births and difficulties in the link mother-baby. Therefore, specialists recommend treat depression during pregnancy when indicated, considering psychotherapy, psychosocial support and, if appropriate, drugs with better security profile.
In addition to therapy, it is advisable to reinforce measures of lifestyle that promote the respiratory health of the future baby: avoid smoke from tobacco and other exposures, ventilate adequately, control allergens domestic and maintain the Vaccines and up-to-date reviews.
Practical recommendations for families and professionals
If there is personal or family history of asthma and symptoms of depression or anxiety during pregnancy, the first step is to communicate it to the health team. The comprehensive evaluation allows to detect modifiable factors (smoking, environmental stress, sleep quality, social support) and implement early interventions.
- Detection and monitoring: Use validated mental health questionnaires and plan obstetric and pediatric check-ups with attention to the infant's respiratory function.
- Non-pharmacological interventions: psychotherapy, techniques of stress reduction, adapted physical activity, home respiratory health education.
- Pharmacotherapy when appropriate: Consider SSRIs when indicated; review alternatives if there is a history of response to tricyclics and assess other approaches.
- Family Focus: Yes there are paternal depression or significant stress at home, integrate support resources for the entire family.
The sum of evidence suggests that the maternal psychological distress during pregnancy is related to greater risk of asthma and with pulmonary function somewhat lower in childhood, probably through intrauterine mechanisms and lifestyle habits. Even so, the depression treatment during pregnancy remains a health priority, and SSRIs are not associated with an overall increase in childhood asthma. Identifying stress, protecting the environment, and supporting families with evidence-based interventions can make a real difference in children's breathing and well-being.