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Here's a source for the above claim that I found after looking this up:

>During pregnancy, the nipple has become more pigmented 68 and is easy for the newborn infant to discover (Fig. 1C). We have observed that soon after birth, the areola expands and takes a bulb-like shape (Fig. 1G). The Montgomery glands also become more pronounced (Fig. 1G). The scent of areolar secretions has been linked to behavioural responses, such as head turning 69 and directional crawling in newborn infants 70. This release of the breast odour by the Montgomery glands is known to help the newborn infant find the nipple 17, 27, 69. The newborn infant recognises the scent of the mother's breast from the amniotic fluid 71, touches the breast and transmits the taste of the breast to the mouth (hand-to-breast-mouth movements) 17. This stimulates rooting and crawling movements in the newborn infant to reach the nipple. The connection between the taste of amniotic fluid and the scent of the breast from the Montgomery glands highlights a biological survival mechanism – a pathway of flavour with lifelong consequences. (Fig. 3) (17, 71-80) When knowing of this sensitive odour-dependent mechanism, it might be wise not to interfere with unfamiliar hands.[0]

[0] https://onlinelibrary.wiley.com/doi/10.1111/apa.14754