As if growing a new human being wasnât enough to make a gal a superhero, here are four additional powers new mothersÂ have that guarantee their status as Wonder Women.
They can squirt milk at the sound of a baby squeak!
Hearing your baby or even just picturing your wee oneâs face is often enough to trigger a new mom to lactate. Why? âWeâre evolutionarily conditioned to respond to a babyâs cry, so just the sound of them causes your brain to release the milk-stimulating hormone oxytocin,â explains New York City pediatrician Dyan Hes, MD.
And this phenomenon can persist even if itâs not your own little one wailing. âI lactated until my kids were four, even though I weaned them both at a year,â recalls Dr. Hes. âEvery time I walked into the hospital nursery and heard a newborn cry it triggered a letdown reaction.â
They can recognize their baby by smell!
Ninety percentÂ of women are able to identify their newborns by scent after spending as little as 10 minutes with them, according to a 2004 Israeli study. It makes sense from an evolutionary perspective: Who wants to nurse the wrong kid? But hereâs another fascinating nugget of info: AÂ 2013 study published in Frontiers of Psychology found that the scent of a newbornâany newbornâactivates the pleasure centers of aÂ new momâs brain.
âMoms are hardwired to respond to babies so they can support the infantâs health and growth, which means that their response to all of a babyâs sensory informationâtheir smell, the feel of their skin, their voiceâis exaggerated, even if the newborn isnât their own,â says Diane Sanford, PhD, a psychologist in Saint Louis, Missouri, and coauthor of Life Will Never Be the Same: The Real Momâs Postpartum Survival Guide ($16.95; amazon.com).
TheyÂ can grow bigger brains!
Women often joke that motherhood has fried their brain cells, but in reality the opposite is true: brain scans of new moms 2-4 weeks and then 3-4 months postpartum show a small but significant increase in their brainâs gray matter volume, according to a 2010 Yale-New Haven Hospital study.
Not surprisingly, the areas that show growth include the hypothalamus and amygdala, which are linked to motivation, rewards, and regulation of emotionâand the mothers who had the most positive perceptions of their babies (rating them as "beautiful," "perfect," and "special," for example) had the biggest gray matter increases.
âWe know that the brain is incredibly plastic even through adulthood," Sanford says. "In this case, as women become mothers our minds respond to our external life circumstances and change in an effort to foster a momâs attachment to her babies.â
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They can diagnose temperature with a singleÂ touch!
Remember how your mother used to rule out a fever simply by placing her hand on your forehead? Turns out mom was right. One Zambian study of moms of children ranging from a month to 16 years found that when mothers thought that their kids' bodies were normal temperature, they were correct 95% of the time. Just chalk it up to motherâs instinct.