Week 10

Your baby is about 30mm from crown to rump. That's roughly a kumquat. And they're doing a lot more than just sitting there.\n\nThose arm buds from a few weeks ago? Real arms now, with real elbows that bend. Fingers and toes have fully separated, no more webbing, and tiny fingernails are starting to form. The skeleton is shifting from soft cartilage to actual bone tissue. It'll stay somewhat flexible for months, but the hardening process is officially underway.\n\nInside that tiny mouth, tooth buds are forming beneath the gums. These are the foundations for baby teeth that won't show up until months after birth. The outer ear is nearly complete, and the inner ear is building the structures that will eventually let your baby hear your voice.\n\nHere's the wild part. Across pregnancy, the developing brain produces an estimated 250,000 new nerve cells per minute on average. That process is in full swing right now. The brain surface is still smooth (those characteristic folds and wrinkles come later), but the architecture is organizing fast. Meanwhile, the liver just quietly took over red blood cell production from the yolk sac. Not a headline moment. But a big deal developmentally.\n\nYour baby's face is looking more human every day. Eyes have moved from the sides of the head toward the front, and the whole profile is getting rounder. If you could see them right now, you'd recognize a tiny person starting to take shape.

If morning sickness has been running your life, here's some hope. nausea peaks around weeks 9 to 11 for most pregnant people, then eases as hCG levels plateau. Most people feel the nausea start to ease within a week or two from here. Not everyone. But most.

You might notice veins becoming more visible on your breasts, belly, and legs. Your blood volume is already increasing. By the end of pregnancy, you'll have roughly 50% more blood circulating through your body, according to a meta-analysis published in BMC Pregnancy and Childbirth. Your heart is working harder to pump that extra volume, which is why you might feel dizzy when you stand up too fast.

Round ligament pain may show up in the coming weeks. It feels like sharp twinges or a pulling sensation on one or both sides of your lower abdomen, usually triggered by position changes. The ligaments supporting your uterus are stretching as it grows. It affects roughly 10 to 30% of pregnancies and is completely harmless, though it can be startling the first time.

If your first prenatal visit hasn't happened yet, it's probably coming this week or next. This is the appointment where things get real: you'll see or hear cardiac activity, get blood work done, and start building a relationship with the provider who'll walk this road with you for the next 30 weeks. One thing to think about: how you want to handle the news. Many parents start sharing around week 12, but there's no rule. Do what feels right for your family.