Do pregnancy and childbirth adversities predict infant crying and colic? Findings and recommendations

Area of Science:

• Pediatrics
• Developmental Psychology
• Maternal Health

Background:

• Infant crying is a common concern for parents and healthcare providers.
• Previous research suggests links between infant crying and prenatal adversities like maternal stress, smoking, and childbirth complications.
• Methodological limitations in existing studies necessitate a re-evaluation of these proposed links.

Purpose of the Study:

• To critically review the methodologies of studies examining the relationship between prenatal adversities and infant crying.
• To present new empirical data assessing the association between childbirth adversity indices and validated measures of infant crying.
• To highlight the need for rigorous research with appropriate safeguards to confirm or refute proposed links.

Main Methods:

• A critical review of existing literature on prenatal adversity and infant crying.
• Empirical analysis of two independent infant cohorts.
• Assessment of validated crying measures against childbirth adversity indices.

Main Results:

• Methodological shortcomings were identified in previous studies linking prenatal adversity to infant crying.
• Four childbirth adversity indices predicted infant crying in the first cohort.
• These predictions were not replicated in the second cohort, suggesting inconsistent findings.

Conclusions:

• Existing evidence linking prenatal adversities to infant crying is methodologically flawed.
• Further research with replication and robust safeguards is essential.
• Claims regarding maternal stress, smoking, or labor medication contributing to infant crying require stronger empirical support.