The fetus can now make a wide range of facial expressions: squinting, frowning, and even grimacing. These are reflexive rather than emotional, but they show how much the facial muscles have developed. The circulatory system is fully operational, pumping about 25 liters of blood per day.
Your Baby This Week
Size: Avocado (about 11.5 cm, or 4.6 inches)
Weight: About 100 grams
- Facial expressions: The muscles and nerves of the face are well enough developed for the fetus to make various expressions
- Circulatory system: The heart pumps roughly 25 liters of blood daily. This will increase to 300 liters per day by the end of pregnancy.
- Toenails: Starting to grow
- Eyes: Moving slowly behind closed lids, though vision is still minimal
- Backbone: Strong enough to help straighten the head and neck
- Patterned movement: The fetus has periods of activity and rest, though there is no set schedule yet
If you had NIPT or CVS, you may already know the sex. Otherwise, the anatomy scan in a few weeks may reveal it.
Your Body
- Visible bump. Most people have a noticeable belly by now.
- Backaches as your center of gravity shifts forward
- Glowing skin from increased blood flow, or breakouts from hormonal changes
- Constipation remains common. Fiber, water, and regular movement all help.
- Nasal congestion continuing
Your uterus is about halfway between the pubic bone and the navel.
What to Do This Week
- Invest in a good pregnancy pillow for more comfortable sleep. Supporting your belly and back makes a big difference.
- Practice good posture. Stand tall, sit with support, and avoid standing in one position for too long.
- Start a baby registry or wish list if you want. The second trimester is a good time to research baby gear without the urgency of the final weeks.
Common Questions
When can I find out the sex?
NIPT results (available from week 10) can reveal the sex with over 99% accuracy. At the anatomy scan (weeks 18 to 22), the ultrasound technician can usually determine it visually, though the baby's position does not always cooperate.
Is it normal for one side of my belly to be bigger?
Yes. The uterus does not always sit perfectly centered, and the baby's position affects the shape of your bump. Asymmetry is completely normal.