Week 39


Week 41


Your Baby at 40 Weeks Pregnant

Baby’s growth and size

Baby is anywhere from 19-22 inches this week and is probably somewhere between 7-9 pounds. In other words – baby is the size of a baby!

What’s new developmentally? 

Not trying to say baby has been lazy over this last week but basically, he/she has spent the last week sleeping and packing on a little more weight. 

Nothing too drastic has happened developmentally over the past 7 days. Your baby is developed and matured and ready to meet you!

Fun facts about your week 40 baby

  • Baby’s bones have hardened (except for the skull bones)
  • Baby might be born with some dry skin in places (due to shedding the skin moisturizer, vernix)
  • Baby is ready to meet you


Week 40 of Pregnancy 

Week 40 pregnancy symptoms 

How should I be feeling at 40 weeks pregnant?

It’s your due date this week, congratulations! I bet no one is more ready to meet this baby than you! I know carrying all that extra weight is making it pretty hard for you to do pretty much anything. 

Some providers are actually on board with inducing healthy, low-risk mamas at 39 or 40 weeks with something called an elective induction. This is typically not something offered to first-time mamas, at least not where I work, but if this isn’t your first rodeo and it’s something you might be interested in, talk to your provider about it! 

And even if an induction isn’t in the cards for you, there’s still a very good chance you will be meeting your baby in the next several days or couple weeks. Be sure to check out my resources on natural ways to induce labor (listed below). 

Pretty much all of them are safe to start doing now that you are 40 weeks. And as always, make sure to run it by your OB provider before doing any of them just to be on the safe side!


More Week 40 Info

Sex positions 40 weeks pregnant

Did you know that sex can actually help send you into labor? When you have sex, with or without an orgasm, there is an increase in uterine activity, which can spark the start of contractions. 

And have you heard of prostaglandins? They are hormone-like substances responsible for helping your cervix change during labor. Guess what is a natural source of prostaglandins….semen! 

Finally, your body releases oxytocin after orgasm. Oxytocin is the same hormone that’s responsible for contractions during labor. As you can see, there are a few ways that sex can help send you into labor. 

You might be wondering if it’s even physically possible to have sex at 40 weeks pregnant. I’m going to help you out here with a few positions that might be possible at 40 weeks. 

  • You can lie on your side and have your partner spooning you from behind
  • You can sit on top of your partner while they lie on their back
  • You can get on all 4’s and have your partner behind you
  • You can scoot to the edge of the bed and have your partner in stand at the end of the bed

Those are just 4 of the more common positions for you to try if you are 40 weeks pregnant and trying to get things going.

A couple things to note: unless advised otherwise by your OB provider, sex during pregnancy is safe for all trimesters. You should also avoid having sex if your water has broken (should be fine to still do if you lost your mucus plug though.) 

40 weeks pregnant and no sign of labor

If you are 39 weeks and not experiencing any signs of labor just yet, try not to get frustrated just yet. I have been in your shoes, mama! 

I actually went past my due date with both of mine, despite doing all the things to jump start my labor. Your time will also come. Assuming you are low risk with an uncomplicated pregnancy, you are probably a good candidate to give some of the things from my “Natural Ways to Induce Labor” article a whirl. 

Disclaimer: none of them should be done without your specific OB provider’s blessing first and none of them are guaranteed to send you into labor, but what do you have to lose (those were my thoughts at least). 

I know you are tired and frustrated and over being pregnant, but try your best to stay mentally focused, you can see that flag waving at the end of the finish line!

Ultrasound at 40 weeks pregnant

If you have an ultrasound at 40 weeks, there’s a couple possible reasons for it. It might be related to concerns about baby’s growth. 

There are come complications and medical conditions during pregnancy labor that can put you at an increased risk for having a baby that is either too large or too small. Things such as gestational diabetes, preeclampsia or gestational hypertension, and intrauterine growth restriction (IUGR) can put baby at risk for being either larger or smaller than expected. 

An ultrasound can not only give us a size estimate, but certain ultrasounds can also monitor the blood flow through the umbilical cord to baby to see if baby is getting adequate blood flow and nutrients needed for growth. If you are experiencing any of these complications during pregnancy though there’s a good chance your provider has recommended an induction or will be recommending one.

Another reason for an ultrasound at 40 weeks is simply because you have now hit your due date. Some providers will recommend an NST (nonstress test) once you’ve hit 40 weeks, and some might recommend an ultrasound or biophysical profile (BPP). 

A BPP actually combines both an NST and ultrasound to assess the health of baby. It looks at things such as fetal movement, breathing, tone, and level of amniotic fluid.

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40 Weeks Pregnant Belly


Tips for 40 Weeks Pregnant

  • Go on a date with your partner
  • Make sure you have arrangements in place for any other children or pets in the house
  • Stock and organize your postpartum basket
  • Prepare older kids for the new baby 
  • Make sure your hospital bag is packed – I have a free checklist to help you 
  • Do these things to prepare for postpartum if you haven’t already
  • Wear your belly support band – my personal favorite 
  • Treat yourself to a prenatal massage or pedicure this week – you and your mental health deserve it! 
  • Think about whether a postpartum doula is right for you 
  • Learn about true vs. prodromal labor
  • Familiarize yourself with some birth affirmations for labor (you can even write or print them on notecards to take to your place of delivery with you)
  • Do a birth class refresher– I recommend going back through the sections that are specific to labor and birth so that it’s all fresh in your min
  • Start prepping for postpartum


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