Baby has grown almost a whole inch since last week and is between 5 and 5.5 inches long. The weight gain picks up as well. This week, baby is about 5 ounces now!
Fat stores are starting to form under baby’s skin. Not only will these fat stores keep baby warm once they are outside of you, but they also provide your baby with energy. These fat stores are called brown fat.
Speaking of skin, your baby is also beginning to develop sweat glands. Another fun skin development, your baby’s oil glands begin producing vernix around this time. Vernix is white, greasy substance that covers and protects their skin. Think of it as a moisturizer! Since baby spends basically 9 months in a swimming pool, they need something to protect their skin.
Unless your baby is born way past their due date, you will notice this thick cheesy substance on their skin at birth. Fun tip: instead of rubbing all of it off, try rubbing it into baby’s skin instead – there are lots of benefits for them and their skin!
Baby grows toenails this week
The umbilical cord is becoming longer but also thicker and stronger
Baby is beginning to hear your voice
Dizziness
Breast changes – areola and nipple get darker and larger
Sinus congestion or rhinitis – safe OTC medications for pregnancy
Pregnancy glow, nail, and hair growth
Unusual dreams (hello hormones)
Stretch marks and itchy boobs
Baby is sure putting on the weight and you might have started to also! Chances are you are still feeling better than you did in your first trimester, even if your bump (and other areas) has started to pop.
It is normal to gain about 1 – 2 pounds per week in the second trimester. Remember though, pregnancy looks different on everyone! With some extra weight, you might begin to notice your skin is itchy or extra sensitive in some places. You might even have some stretch marks developing.
Most people think you can only get stretch marks on your belly, but they are also common on your thighs, upper arms, breasts, calves, and booty too! If you are interested in my favorite stretch marks creams you need to make sure you check out this article!
Speaking of breasts, you might also notice some dark veins appearing in your breasts. This is related to the increased blood flow that happens in preparation for milk production – our bodies are simply amazing, aren’t they?
Between weeks 16 and 18, you may be offered a test for something called Alpha Fetal Protein (AFP). This test helps screen neural tube defects such as spina bifida.
If your screen is positive, your OB provider will refer you to a high-risk specialist or Maternal Fetal Medicine doctor for more testing.
No stress if you don’t have an ultrasound scheduled this week. The second trimester ultrasound, also known as anatomy scan, typically takes place between weeks 18 and 21.

Get a pregnancy planner or journal if you haven’t already
Start documenting your bump with a weekly picture - I used the Baby Story: Pregnancy Pictures app during my pregnancies
Consider investing in a pregnancy pillow- I have a couple on my Amazon Storefront to help you narrow your search
Start thinking about a babymoon if you plan on taking one
It's never too early to start looking into childcare options – trust me on this one, mama, preschools and daycares fill up fast
Make a point to check in with your mental health – it’s never too early to start doing this and mama, you sure deserve it
Do some research on the anatomy scan so that you come prepared with questions if you have any – you can learn more here
Apply stretch mark cream or regular lotion daily
Begin researching birth classes – there are SO MANY out there, but I actually have online birth classes available for you to take from the comfort of your own home! Learn more about my online birthing classes today I actually have online natural, epidural, and C-section courses that you can take all from the comfort of your own home, so check them out here
Sign up for MLN weekly pregnancy updates to stay up to date on everything going on with your pregnancy. So much good information and it’s all free!






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