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What is Swallowing breathing reflex - not seen in fetus for ? and explain in detail?
Ans. is 'b' i.e., 12 weeks Behavioural deveopment in intrauterine life Muscle contractions first appear around 8 wk, soon followed by lateral flexion movements. By 13-14 wk, breathing and swallowing motions appear and tactile stimulation elicits graceful movements. o The grasp reflex appears at 17 wk and is well developed by 27 wk. Eye opening occurs around 26 wk. During the 3rd trimester, fetuses respond to external stimuli with hea rate elevation and body movements