Title: | Maternal areola pH: A chemical basis for mother-infant recognition |
Author(s): | Zanardo V; Volpe F; Parotto M; Giliberti L; Simbi A; Severino L; Straface G; |
Address: | "Division of Perinatal Medicine, Policlinico Abano Terme, Abano Terme, Italy. Electronic address: vincenzo.zanardo@libero.it. Division of Perinatal Medicine, Policlinico Abano Terme, Abano Terme, Italy. Department of Anesthesiology, Toronto University, Toronto, Canada" |
DOI: | 10.1016/j.earlhumdev.2018.05.001 |
ISSN/ISBN: | 1872-6232 (Electronic) 0378-3782 (Linking) |
Abstract: | "BACKGROUND: The human female's areolar region is the point of arrival of a natural progression from birth to breastfeeding continuum, supported by numerous functional features. AIMS: The aim of this study was to look more closely into the areola' skin chemical signals that are uniquely important for mother-infant chemoemission, chemoreception, and breastfeeding continuum. STUDY DESIGN: A dermatological study of the areolae and corresponding breast quadrants was undertaken on 71 healthy, at-term women. Areolar and corresponding breast quadrant pH were assessed pre-partum and 1 and 2?ª+days post-partum using a corneometer (Soft Plus 5.5; Callegari S.P.A., Parma, Italy). RESULTS: Pre-partum, the pH of the areola was significantly higher than the pH of the breast quadrant (4.25?ª++/-?ª+0.26 vs. 4.06?ª++/-?ª+0.44, p?ª+ª+0.015). Post-partum, the pH of the areola was significantly higher that the pH of the breast quadrant both on day one (4.28?ª++/-?ª+0.31 vs 4.01?ª++/-?ª+0.25, p?ª+ª+0.001) and on day two (4.39?ª++/-?ª+0.19 vs 4.01?ª++/-?ª+0.16, p?ª+ª+0.001), respectively. In addition, pre-labor pH of the areola increased on day one post-partum and significantly on day two postpartum (4.25?ª++/-?ª+0.26 vs 4.39?ª++/-?ª+0.19, p 0.004). Moreover, the pH of the areola increased significantly from day one to day two post-partum (4.28?ª++/-?ª+0.31 v s 4.39?ª++/-?ª+0.19, p?ª+ª+0.041). CONCLUSIONS: Our findings show, for the first time, that the areola has a higher pH than the surrounding breast skin, and this increases from day one to day two postpartum. We believe that the pH changes of the areolar region may act as a unique chemical signal to guide the infant directly to the nipple" |
Keywords: | "Adult Breast Feeding/psychology Female Humans Hydrogen-Ion Concentration *Mother-Child Relations Nipples/*chemistry Pheromones, Human/*analysis *Recognition, Psychology Smell Areolar skin pH Breast feeding continuum Chemical identification Chemoreception;" |
Notes: | "MedlineZanardo, Vincenzo Volpe, Francesca Parotto, Matteo Giliberti, Lara Simbi, Alphonse Severino, Lorenzo Straface, Gianluca eng Ireland 2018/05/11 Early Hum Dev. 2018 Jun; 121:33-36. doi: 10.1016/j.earlhumdev.2018.05.001. Epub 2018 May 8" |