All Acronyms. UA [Internet]; Jul 31, 2016 [cited 2016 Jul 31]. Available from: http://www.allacronyms.com/_Military/UA. 'UA', All Acronyms, 31 July 2016, <http://www.allacronyms.com/_Military/UA> [accessed 31 July 2016] All Acronyms, UA (Jul. 31, 2016, 2:07 AM), available at http://www.allacronyms.com/_Military/UA.
1 6-12 months: itâs another baby! 2  The child behaves as though the infant in the mirror is someone else â someone theyâd like to be friendly with. 3  They display approach behaviours such as smiling and making noises. 4  13-24 months: withdrawal.
Confidence votes 25.5K. Smiling begins at birth; yet it is more out of natural instinct than to show an outward sign of pleasure. It has been found that this generally occurs at around 2 months of age. Babies smile in the womb, probably just to flex the facial muscles. Smiling to indicate pleasure starts generally around 6-8 weeks. Smiling begins at birth; yet it is more out of natural instinct than to show an outward sign of pleasure. It has been found that this generally occurs at around 2 months of age.  Smiling to indicate pleasure starts generally around 6-8 weeks.