Pregnancy Stages of Pregnancy Week by Week Pregnancy Week 7 Your baby's brain is developing rapidly in week seven. Get the details on the latest changes, plus advice on preparing for your first Prenatal visit and bonding with your partner during your pregnancy. By Parents Editors Parents Editors The Parents Editors byline means there is an experienced group of editors and journalists behind the scenes of the article. Learn more about the Parents team, our core values, and editorial guidelines. our editorial guidelines Updated on July 12, 2022 Share Tweet Pin Email How Big is Baby? Your baby is now about the size of a small blueberry. Her arm buds, which formed last week, now look like paddles. Baby's Length: 0.50in.Baby's Weight: 0.04oz. Mom's Changing Body Even though you're not starting to show yet, you may notice you've put on a few pounds and your pants are starting to feel tight. You aren't big enough for maternity clothes at this point, but you might want to start shopping for the future. Your skin may be going through some changes already, too. If you're lucky, you'll be sporting the pregnancy glow, but don't be surprised if your skin reacts to the influx of pregnancy hormones with a break-out. Baby's Development Your baby is already developing amazingly distinct facial features. Dark spots mark the areas where her eyes and nostrils will be, and a little mouth and ears are starting to form, too. Your baby's brain is also growing more complex; if you could take a peek, it would be clearly visible inside the transparent skull. In fact, nerve cells in your baby's brain are growing at an amazing rate—100,000 cells per minute! And she's started to move in small, jerky motions, although you won't feel these movements until about your fourth month of pregnancy. Read More Weekly Tip Granted, it's hard to focus on other people's feelings right now—what with having to tend to your own tummy issues—but there's a rather selfless question you'll want to ponder: How is your partner taking all of this? Some partners are super-supportive and ecstatic, while others may feel overwhelmed by the slew of changes taking place. It's perfectly normal for yours to suddenly obsess over the family finances or fixate on the idea of moving to a bigger home. (Just call it the male version of the nesting instinct.) Chat up your guy to feel out any of his worries or concerns. Goodness knows you're going to be counting on him to do the same for you. American Institute of Ultrasound in Medicine - AIUM.org Week 7 Ultrasound During this week of the first trimester, you can see baby-to-be is developing in a bubble within the gestational sac. The bubble around the embryo is the amniotic cavity filled with amniotic fluid. This liquid environment gives your baby room to grow and develop and to move. The amniotic fluid also cushions your baby-to-be from any external pressure on the abdomen. The black area inside the head is part of the developing neural tube. Read More What Week 7 of Your Pregnancy Is Really Like This Week's To-Do List Schedule and prepare for your first prenatal visit, which should happen between 8 and 12 weeks.Read More Compile a list of questions for your first doctor's appointment.Read More Clear your beauty cabinet of any chemical-laden products like DEET-filled insect repellent.Read More Buy a belly band to extend the life of your pants.Read More This Week's FAQs Are Spas Safe? How do I get advice from my doctor between checkups? Must-Reads Pregnancy Skincare: What's Safe for Your Face and Body Top 13 Pregnancy Fears (and Why You Shouldn't Worry) Was this page helpful? Thanks for your feedback! Tell us why! Other Submit