Pregnancy › Week by Week › Week 7
At 7 weeks your baby is about the size of a blueberry, and the brain, face, and limb buds are developing fast.
Size
A blueberry
crown to rump
Length
0.5 in
about 1.3 cm
Weight
Under 1 g
still under a gram
Your baby at 7 weeks
Big brain growth this week, plus arm and leg buds becoming paddles and a heartbeat that can often be seen on an ultrasound.
Development is moving quickly now, and much of it is happening in the head. Your baby has roughly doubled in size since last week.
Brain and face. The brain is growing rapidly, and the features of the face are starting to take shape: dark spots where the eyes are forming, small pits for the nostrils, and the beginnings of the mouth and inner ears. The head is large relative to the body, which is completely normal at this stage.
Arms and legs. The little arm and leg buds that appeared last week are lengthening and flattening at the ends into paddle shapes, the earliest hint of hands and feet. They will separate into fingers and toes over the coming weeks.
Inside. The kidneys are forming and getting ready to do their job, and the heart, now divided into chambers, is beating steadily. On an ultrasound around this week, that flicker of a heartbeat is often visible for the first time.
How big is your baby at 7 weeks?
About half an inch (1.3 cm) crown to rump, and still weighing under a gram.
Length this early is measured crown to rump, from the top of the head to the bottom, because the legs are curled. There is still no bump to see from the outside, but your baby has grown a great deal in a short time and is now clearly more than a cluster of cells.
Your body at 7 weeks
For many people nausea and fatigue are at their strongest around now, even though nothing shows on the outside yet.
Week 7 is often a low point for early pregnancy symptoms. Nausea and food aversions can be at their most intense, sometimes with a lot of extra saliva, a metallic taste, or strong reactions to smells. Bone deep tiredness is common as your body works hard behind the scenes, and your breasts may feel tender, fuller, or heavier. If the fatigue has you reaching for extra coffee, keep an eye on the caffeine limits for pregnancy.
There is usually no visible bump this week, which can feel strange when you may be feeling so different on the inside. Bloating, mild cramping, and more frequent trips to the bathroom are all common. If nausea is making it hard to eat, small and frequent bites of whatever stays down are perfectly fine for now.
What is normal, and when to call your provider
Mild cramping and light spotting can be normal in early pregnancy, but call your doctor or midwife the same day if you have any of these:
- Vomiting so severe you cannot keep any fluids down, which can be more than ordinary morning sickness and is treatable, so do not tough it out
- Heavy bleeding, especially soaking a pad, or passing clots
- Severe or persistent abdominal or pelvic pain, or strong one sided pain
- Signs of dehydration such as very dark urine, dizziness, or a dry mouth that will not ease
- A fever over 100.4°F (38°C), or fainting
Your week 7 checklist
- Keep taking your prenatal vitamin, and take it at whatever time of day it stays down best
- Eat small, frequent snacks and sip fluids steadily to manage nausea and stay hydrated
- Confirm your first prenatal visit is booked, usually around 8 weeks
- Rest without guilt. Fatigue is often heaviest right about now
- Tell your provider if nausea is stopping you from keeping fluids down, since there is help for that, and check what is safe to take before reaching for any cold or flu remedy
Appointments and tests around 7 weeks
No routine tests are due this week, though an early dating ultrasound is sometimes done if your dates are uncertain.
For most people the first prenatal appointment and ultrasound land around 8 weeks, so week 7 is often the last week of waiting. That said, if you are unsure of your dates, have had bleeding, or have a history that warrants a closer look, your provider may arrange an early dating ultrasound now. Around this point a heartbeat can often be seen, which many people find reassuring. There are no required screenings this week, so the focus stays on managing symptoms and getting ready for that first visit.
A few things worth having on hand now
A note for your partner
This can be one of the roughest weeks for how she feels, with nothing to show for it yet. You can help most by taking nausea seriously: handle cooking and strong smells, keep the fridge stocked with the few things that sound bearable, and step in on chores without keeping score. If she cannot keep fluids down, encourage her to call the provider, since that is something they can treat rather than something to endure.
You are not alone this week
Seven weeks can feel like the hardest stretch of the first trimester: peak queasiness, deep fatigue, and no bump to make it feel real to anyone else. If you are counting the days to your first scan and just trying to get through each afternoon, you are in very good and very normal company. This intensity does tend to ease in the weeks ahead.
7 weeks pregnant, common questions
Is 7 weeks when morning sickness is worst?
For many people nausea peaks somewhere between about 7 and 10 weeks, so week 7 can feel like a low point. It usually eases for most people toward the end of the first trimester, though the timing varies from person to person.
Can I see a heartbeat at 7 weeks?
Often, yes. If you have an early ultrasound around this week, a heartbeat can frequently be seen. If it is not visible yet, that can simply mean your dates are a little earlier than thought, and your provider may suggest rechecking in a week or two.
I feel so sick I can barely eat. Is that okay?
Occasional trouble eating is common, and small frequent bites of whatever stays down are fine for now. But if you cannot keep any fluids down, are losing weight, or feel dehydrated, call your provider. That can be a treatable condition called hyperemesis, and you do not have to just push through it.
Why is there still no bump at 7 weeks?
Because your baby is only about the size of a blueberry and your uterus is still low in your pelvis. Any early roundness is usually bloating rather than a true bump. A visible bump typically shows up later in the first trimester or into the second.
Sources
- American College of Obstetricians and Gynecologists (ACOG), first trimester care and early pregnancy guidance.
- Mayo Clinic, Fetal development: the 1st trimester.
- MedlinePlus, National Library of Medicine (NIH), Fetal development and prenatal care.
Medical disclaimer: This page is for information and education only and is not a substitute for professional medical advice. Every pregnancy is different. Always follow the guidance of your doctor, midwife, or qualified provider, and contact them with any concerns.