Perkembangan Bayi : Trimester 2

WEEK 14 : Shake it baby!

fetus in fourth monthIsn’t it glorious? You and your little buckaroo have roped your way right into trimester numero dos! Are you ready to rock!? Okay, okay… maybe just a little rolling and poking. Needless to say, your baby will definitely be making themselves known in the upcoming weeks. At about 3.5 inches long, their little body and limber limbs are coordinated enough for loads of complicated motions. In fact, their whole body is moving right now! You're not feeling it because their current size is still a bit too small to make an impact you'd recognize. Still, their movements are recognizable on an ultrasound. Speaking of which, you shoud be scheduling one with your health care provider! Week 16 is the classic date as you can usually determine whether your little one is going to pee standing up or sitting down. Your baby is also starting to develop the ability to move their eyes this week, although the eyelids still remain fused shut. What's more, they can make all sorts of fun facial expressions as they practice squinting, frowning, and grimacing. Cute development of the week: their little hands can grasp at things and they may already be sucking their thumb!

WEEK 15 : Your little hairy baby

fetus in fourth monthYour nearly four-inch long gymnast is happily mobile inside your womb and if you're really lucky, you’ll notice a point when your sneezing, coughing or laughing results in a little kick here or a poke there. Still, many women don't feel anything until the 17th week or later. Although the poking and kicking isn't very charming during sleeping hours, it’s a good sign as it means your baby is actually reacting to outside events. Yay! You’ve got yourself one active healthy baby! Their little elbows and knees are bending more freely this week and their little legs are finally growing longer than their arms and getting pumped up for prenatal Richard Simmons. Many of their major organ systems are increasing in capacity—particularly that amazing tiny heart and complex circulation system, which is now pumping about 25 quarts of blood per day, and will increase to a very impressive 200 quarts per day by the end of the pregnancy. As far as hair goes, we’ve got some new scalp patterns beginning to develop on the head, although actual head hair is not yet present.

WEEK 16 : Time for ye olde ultrasounde

fetus in fourth monthOver the past three weeks your astounding growing baby has managed to stretch yet another 2 full inches (totaling about 4.5 inches) and weighs around 3.5 ounces. Yessireee, that’s some pretty serious growth... and with it comes several physical developments! For starters, their head to body ratio is finally starting to even out a bit as the rest of the body is actually growing faster than the head at this point. Yes, your little light bulb is not so top-heavy. Their adorable little limbs have lengthened, almost reaching their normal proportions which they will have at birth. Their eyes are still closed but moving and if you had an ultrasound, which many doctors recommend you have at about this time, you may even see your little one sucking on a thumb, not to mention the necessary signifiers to let you know whether you’ve got a wee lad or lassie.

WEEK 17 : Grow Team Grow!!!

fetus in fourth monthDon't be too shocked but... your baby is EVEN bigger than it was last week, not to mention getting cuter, and smarter every day! As you’ve come to expect, there’s no shortage of growth and development this week: your fantastic little bean stalk has added yet another half inch to their overall height-- making them nearly half a foot long! Their little limbs have reached (or are within one week of) their relative proportions, and will continue to grow evenly with the rest of the body after this week. Reactive listening has begun for your baby, even though their ears are not yet structurally complete or fully functional. Meanwhile, different parts of their astonishingly complex brain are developing to process your little one’s hearing and other senses, (you know, sight, smell, taste and touch). Mind boggling factoid of the week: if you’re having going to have a little girl, her ovaries have already produced millions of primordial egg cells, which, within a few weeks, will develop into actual eggs! Phew… just wait till she’s a teenager eh?

WEEK 18 : Your cute little greasewd piglet

fetus in fifth monthWe have two more ounces! Your "getting bigger-n-better by the minute baby" is already up to 7 ounces and 6 inches! This is a big week for their baby skin. There are now two distinct layers—the epidermis (or the surface skin) and dermis. Currently, their skin is covered with a greasy, waxy, cheese-like substance, known as vernix caseosa. Sure, it sounds pretty nasty, but this mixture of fatty secretions covering your little swimmer from head to toe is the best way to protect their oh-so-thin skin from bruising and abrasions as well as chapping caused by amniotic fluid exposure (and your little one is swimming in that stuff!). Still don’t like the fact your little darling is currently slathered in fatty cream like a greased pig? Well, you know the birthing process? Where you have to push something the size of a watermelon out a hole the size of a grape? That adorable little greased piglet would have a lot harder time getting through the birth canal without the vernix caseosa. Fun fact for momma’s with baby girls: it’s a uterus within a uterus! Your little girl will have developed a uterus and vagina canal by the end of this week.

WEEK 19 : The poop factory is now open

fetus in fifth monthYour amazing little baby is now around 10 inches in length! If this seems a bit shocking, you’ll be relieved to know they’ve not actually grown over 3 inches, but that their little legs are now straight enough to be measured. This is when doctors begin measuring fetal growth from head to toe, (no longer “crown to rump” or CR). Lanugo (little hairs) covers their whole body now, trapping that charming cheese-like vernix caseosa (see week 18) to the surface to the skin. This week your lil’ fetus will start on an appetizing diet of amniotic fluid which they are now capable of swallowing, digesting, and passing the fluid as far as their tiny “large” intestines. Fortunately for you, this nice little lump of baby-poop won’t be coming out while they’re still in your womb. Some time shortly after they’re born, this fun lump will become the first in a long line of baby poops. (What finally comes out— commonly known as “meconium” to the science world, will be black and sticky, and you’ll be very glad it happens only once!)

WEEK 20 : Congratulations, you now have a mini-baby!

fetus in fifth monthThis week you're carrying about 10.5 inches and 10.5 ounces of solid baby-miracle-goodness! Their little delicates bones continue to ossify and toughen while their itsy bitsy finger and toe pads are finishing up. Your little monkey now has teeth buds, although they’re hidden beneath the gum line. And finally! Their limbs have reached their relative proportions—no more alien baby! Their cute pink lips are more defined, and might be helping out in a bit of prenatal thumb-sucking. If you have a little boy, then their tiny testes are descending, though they have not yet passed the abdominal wall. What’s more, eyelashes and eyebrows are also visible. At this point, your little one really looks like a miniature baby—and we do mean miniature as your little swimmer currently weighs a mere eighth of their final birth weight. With half the pregnancy behind you, the most significant gains are yet to come!

WEEK 21 : Look Mommy, I'm dreaming!

fetus in fifth monthYour beautiful little miracle-gro baby will be putting on a full ounce and a half this week (and weighing up to 16.5 ounces), but that’s just the beginning! Within the next five weeks, they’ll really be packin’ it on! For now, we’re pleased to report the addition of rapid eye movement (REM) a key component to any healthy baby’s sleep schedule. While in the dermatology department: their thin soft skin is very red, rather translucent, and a bit wrinkled. Not to worry, it’s not a premature aging disease. It's just their clever little body setting them up with extra space that will smooth out once your little one starts packing on the baby-fat. That won’t be for a few more weeks, though. So for the time being, your munchkin is still a little lean mean growing machine! The beginnings of what is commonly called “brown fat” is just starting to fill in to help your baby retain some body heat, which is crucial as they’re not yet capable of regulating their own body temperature.

WEEK 22 : Welcome to raisin country!

fetus in fifth monthThe grow must go on! No wonder you’re getting so big, you’re now housing a wonder-baby who weighs nearly a pound and measures nearly a foot in length. Their perfect little pancreas is now further developed and they’ve also started producing their own hormones! Your baby's future in the circus as a world-famous tight-rope-walker is secure: their inner ear is now developed to the point that they have their own sense of balance. Lucky for your little explorer, balance also promotes physical dexterity, which has them actively feeling out their surroundings where skin, body parts, and the resident umbilical cord are the big sensory experiences. Your foot-long baby, is looking a bit like an oversized raisin right now as more and more wrinkles are showing up each week. Not to worry, all that excessive wrinkling is just their skin’s way of planning ahead for the time when they’ll start piling on that irresistible baby chub.

WEEK 23 : Dancing baby alert!

fetus in sixth monthAt this point you’ve pretty much adjusted to the fact you’ve got a moving little gymnast inside of you, but now they’re going to kick up the party a notch because they can hear and react to sounds from the outside world. Sounds from your alarm clock, a thunder roll, or that darned car honking at you across the intersection can actually jar their little ears enough to elicit a kick or violent bout of squirming. Of course this also means that their little ears are picking up the sounds of your voice and those near you. So go ahead, sing a lullaby to your little angel—if they start kicking, it’s likely they just want you to stop… or maybe it was a kick of approval? You decide. Your baby's tiny taste buds are still growing and their bones are continuing to ossify (harden), their tiny veins are visible through their translucent yet wrinkly skin. (Think of it this way: they’ve been swimming in the equivalent of a long hot bath for the past 23 weeks, so you can’t blame them for being a little prune-like.)

WEEK 24 : Breathe baby, breathe!

fetus in sixth monthThis is another big week for your magical growing baby! Just take a look at the checklist for this week: 1) ears: done; 2) fingernails: done; 3) (if you have a boy) testicles: taking their 3-4 day trip from the abdominal wall to the scrotum; and 4) lungs walls: secreting “surfactant”. What’s that? Well, surfactant is sort of what it sounds like: a surface-activated fat whose main purpose is to assist the your baby's little lungs during inflation (as in, filling with air, not getting more expensive). Just in case you’re curious, your submerged baby is still breathing in amniotic fluid, preparing and rehearsing the lungs an oxygen-filled life outside the womb. By the end of this week, your child will be weighing around 2 lbs and 14 inches long. Your cutie-patootie may even be a little more plump, but isn't anywhere near their full baby-fatted cute-self. Most of the “filling out” is coming up in that long awaited (and slightly dreaded?) third trimester. Woo-hoo! Get ready!

WEEK 25 : Turn it around... and around

fetus in sixth monthYour little grower’s physical proportions are evening out at this point and most of their remaining development will largely be weight gain and lots and lots of nervous system development. The good news is: if your child is born premature now they’ll be more likely to survive without too much trauma as their lungs began to produce “surfactant” last week, which means their tiny respiratory system is getting stronger with each passing day. Yes, now’s a good time for a minor sigh of relief and a quick pat on the back. All that hard work and conscientious living is really getting your child prepared for a healthy delivery. Keep up the fabulous work mama! This week they’ll be scootching slowly out of the old breech position and start rotating (already!) into a better position for exit during their birth. Their head and feet are slowly rotating so that the head is pointed down towards the birth canal. Time is short (or really long, depending on who you ask)—just (still!) 14 weeks left before you can go back to being a single-resident human.

WEEK 26 : Eye see YOU!

fetus in sixth monthAt long last, your little swimmer can see the womb! Your miracle’s little eyelids have finally separated (they were fused closed previously) and they’re probably having their first moments of sight as you read this (or maybe it already happened while you were brushing your teeth or watching Oprah or something). In addition to seeing their little studio in your belly, they’ve recently acquired the ability to say “yes” and “no” in rudimentary sign language as they can now move their head back and forth. This is also the time where your little super star’s head hair is starting to grow! A cute little cowlick or two may be springing into position right now, getting ready for years of cute-but-stubborn bed-head. Also, their toenails have grown in and you little raisin continues to slowly pile up fat beneath their still-loose skin. Most importantly, brain tissue and neurons are all developing at a rapid pace, increasing their (genius-level?) brain activity and will continue to function at accelerated levels for the first seven to eight years of childhood!

credit to : http://pregnancy.baby-gaga.com