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the action or process of fertilizing an egg
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Your baby-in-the-making is a ball of cells called a blastocyst.
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The ball of cells has officially become an embryo and is about the size of a poppy seed
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Your baby's tiny heart begins to beat – at twice the rate of yours. His entire "body" is only about the size of a sesame seed.
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Facial features (like eyes and nostrils) are beginning to form, and little buds appear where arms and legs will develop
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Arms and legs are growing, and your baby now has little fingers, as well as a nose and upper lip.
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Eyes have developed, though your baby's eyelids are fused shut for now. She's lost her "tail" and is starting to look more human.
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The embryo has become a fetus. His vital organs – such as kidneys, intestines, brain, and liver – are starting to function. Tiny fingernails and toenails are forming.
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Your baby is almost fully formed. Her bones are beginning to harden, and her genitalia are developing externally. She can hiccup, though it's too soon for you to feel it.
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You can hear your baby's heartbeat at a prenatal checkup.(You may already have heard it at an early ultrasound.) Your baby's just over 2 inches long and weighs about half an ounce.
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Your baby's kidneys are producing urine, and he releases it into the amniotic fluid. He can make facial expressions and may have discovered thumb-sucking.
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Your baby can see light that filters in from outside your womb, even though her eyelids are still shut.
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Your baby's sex may be detectable at your mid-pregnancy ultrasound, which typically happens between 16 and 20 weeks
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If you haven't felt your baby move yet, you probably will in the next few weeks. It'll take a couple of weeks longer for your partner and other people to feel your baby's movements from the outside.
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Your baby can hear your heartbeat and sounds that come from outside your body, such as your partner's voice. Your baby might even be startled by a loud noise.
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Gulping down several ounces of amniotic fluid each day
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sleeping in cycles about 12 to 14 hours per day
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Your baby's sense of movement has developed, so he can feel the motion if you dance. His sense of hearing continues to improve.
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Your baby's taste buds are developing. Her brain is growing very quickly, and her hair may be growing, too.
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She's enjoying her new sense of equilibrium! She's growing more fat and more hair too!
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Your baby's been doing "practice breathing" by inhaling and exhaling amniotic fluid, and if he was born now his lungs could function
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Your baby may be dreaming. She has eyelashes, and her eyesight is improving. She weighs about 2 1/4 pounds and is about 15 inches long, head to heel.
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He's growing white fat deposits under his skin, and his energy is surging because of it.
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brain is getting wrinklier
skin is getting smoother -
All five of his senses are in working order and major brain and nerve development
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He's grown cute little fingernails and toenails. He's almost 17 inches long (head to heel) and weighs about 3 3/4 pounds.
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If your baby's born now, she's considered "late preterm." Healthy babies born at this stage usually do fine, though they need some care in the neonatal intensive care unit.
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hearing is fully developed, and he responds best to high-pitched noises
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Your baby is now considered full-term. His lungs should work fine if he's born now, but ideally he'll stay in your womb a bit longer.
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Your baby is due and fully ready for life outside the womb. The average weight of a newborn is about 7 1/2 pounds, and the average length is about 20 inches.
