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7 week
Hands and feet are emerging from developing arms and legs — although they look more like paddles at this point than the tiny, pudgy extremities you're daydreaming about holding and tickling. Technically, your baby is still considered an embryo and has something of a small tail. The tail will disappear within a few weeks, but that's the only thing getting smaller. Your baby has doubled in size since last week and now measures half an inch long, about the size of a blueberry.
Babycenter.com -
10 week
Vital organs — including his kidneys, intestines, brain, and liver (now making red blood cells in place of the disappearing yolk sac) — are in place and starting to function, though they'll continue to develop throughout your pregnancy.like tiny nails forming on fingers and toes (no more webbing) and peach-fuzz hair beginning to grow on tender skin. -
12 week
baby's fingers will soon begin to open and close,it's toes will curl, it's eye muscles will clench, and it's mouth will make sucking movements.It's face looks unquestionably human: His eyes have moved from the sides to the front of it's head, and it's ears are right where they should be. -
15 week
It's busy moving amniotic fluid through it's nose and upper respiratory tract, which helps the primitive air sacs in it's lungs begin to develop. it's legs are growing longer than it's arms now, and it can move all of it joints and limbs. Although it's eyelids are still fused shut, it's can sense light. -
19 week
baby's sensory development is exploding! Her brain is designating specialized areas for smell, taste, hearing, vision, and touch.Her arms and legs are in the right proportions to each other and the rest of her body now. Her kidneys continue to make urine and the hair on her scalp is sprouting. A waxy protective coating called the vernix caseosa is forming on her skin to prevent it from pickling in the amniotic fluid. -
23 week
. Blood vessels in her lungs are developing to prepare for breathing, and the sounds that your baby's increasingly keen ears pick up are preparing her for entry into the outside world -
26 week
He's inhaling and exhaling small amounts of amniotic fluid, which is essential for the development of his lungs. These so-called breathing movements are also good practice for when he's born and takes that first gulp of air. And he's continuing to put on baby fat. He now weighs about a pound and two-thirds and measures 14 inches (an English hothouse cucumber) from head to heel. -
30 week
A pint and a half of amniotic fluid surrounds her, but that volume will decrease as she gets bigger and takes up more room in your uterus. Her eyesight continues to develop, though it's not very keen; even after she's born, she'll keep her eyes closed for a good part of the day -
33 week
He's rapidly losing that wrinkled, alien look and his skeleton is hardening. The bones in his skull aren't fused together, which allows them to move and slightly overlap, thus making it easier for him to fit through the birth canal. (The pressure on the head during birth is so intense that many babies are born with a conehead. -
37 week
Your baby is now considered "full term," even though your due date is three weeks away. If you go into labor now, his lungs will likely be mature enough to fully adjust to life outside the womb. (Some babies need a bit more time, though. So if you're planning to have a repeat c-section, for example, your practitioner will schedule it for no earlier than 39 weeks unless there's a medical reason to intervene earlier.)
