Here’s a fun fact: At 7 weeks pregnant, your embryo is now 10,000 times bigger than it was when it arrived in your uterus! Your baby is growing rapidly and generating new brain cells at a rate of 100 per minute.
As you head into the second half of your first trimester, it's common to experience symptoms like morning sickness, tender breasts and food aversions.
Your Baby at Week 7
Things are full speed ahead inside your still-flat tummy. It’s only been five weeks since conception but your embryo is 10,000 times bigger now than it was when it arrived in your uterus. Of course it’s still pretty small — around a quarter of an inch or the size of a blueberry.
Happily, that reptilian tail has all but vanished by now and your little cutie is starting to look a little cuter — with dark spots that’ll become eyes, two holes that will turn into nostrils, the beginnings of lips and, believe it or not, the early beginnings of tooth buds. But it’s the brain that’s getting all the attention now. Baby’s noggin wins the prize for biggest growth spurt this week as that busy brain-cell factory cranks out 100 cells per minute.
Your little sprout is sprouting in other places, too. The limb buds are elongating and will soon become defined shoulders, arms, legs, and knees gearing up to kick you within another month or two. The little paddles at the ends are becoming more distinct and will soon develop into ten kissable fingers and ten kissable toes.
Baby’s liver is in the early stages of formation and will soon begin producing red blood cells. And hot off the production line are baby’s permanent kidneys that are standing by, ready to produce pee in the next few weeks. No need for diapers just yet, though. The embryo’s urine flow will become part of the amniotic fluid it ingests and excretes continuously over the next seven months.
At a Glance
7 weeks pregnant is how many months?
If you're 7 weeks pregnant, you're in month 2 of your pregnancy. Only 7 months left to go! Still have questions? Here's some more information on how weeks, months and trimesters are broken down in pregnancy.
How big is my baby at 7 weeks?
Your baby's approximately a quarter of an inch in length now — about the size of a blueberry. Sounds pretty tiny still? Consider this for a little perspective: Your baby is 10,000 times bigger now than she was at conception a month ago.
New brain cells form rapidly
At 7 weeks pregnant, most of that growth is concentrated in the head (the better to store all those smarts) as new brain cells are generated at the rate of 100 per minute. How's that for a budding genius?
Baby's arms and legs start developing
And talking about buds, your baby is going out on a limb this week. Her arm and leg buds begin to sprout and grow longer and stronger, dividing into hand, arm and shoulder segments and leg, knee and foot segments — though the limb buds look more like paddles than hands or feet at this early stage.
Baby's got kidneys
Also forming this week are your baby's mouth and tongue. The kidneys are in place now, too, and are poised to begin their important work of waste management. Soon, your baby will start producing urine. Lucky for you, there's no need for diapers yet.
What to Expect selects products based on independent research and suggestions from our community of millions of parents; learn more about our review process. We may earn commissions from shopping links.