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Pregnancy Calendar

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cute illustration of butternut squash with eyes depicting size of fetus at 20 weeks

Week 20

Your Baby:

  • Is as big as (depending on which measurements from which pregnancy book you use and of course, Your Produce May Vary) a butternut squash, or as long as a banana, or possibly a carrot. I am getting the sense these comparisons are not really an exact science.
  • Will be measured head-to-toe from this point on, instead of the head-to-rump measurements we’ve used so far. I remember choking on a bagel at 21 weeks last time because HOLY CRAP, MY CHILD JUST GREW FIVE INCHES IN A WEEK.
  • Has a heartbeat that can be heard with just a regular old stethoscope now and not just the fancy doppler.
  • Is swallowing and practicing other digestive skills, and can now produce meconium, which is essentially prenatal poop that sits in the bowels during pregnancy. You’ll see this awesome goopy stuff in person during your baby’s very first diaper change, or possibly even during labor like I did, as some babies like to take their first crap in the womb. Meconium in the fluid in considered a delivery complication, but it’s very common and not terribly dangerous — your doctor will just need to suction your baby’s nose and mouth immediately after delivery to prevent any meconium going into your baby’s lungs with their first breath.


  • Seriously. You are halfway through this pregnancy, which may bring to mind such deep thoughts like: “Yay!” or “Uh-oh” or “Whoa” or “Must. Organize. Kitchen. Cabinets.”

Let’s talk skin today. Oh, but your poor skin takes such a beating during pregnancy, from itching to rashes to stretch marks to breakouts to other just plain weird stuff.

First up, stretch marks. Don’t kid yourself. There’s nothing you can do to prevent stretch marks. You will either get stretch marks…or you won’t, and no amount of cocoa butter is going to change that. According to Wikipedia, one lone study claimed that a daily application of one lone type of cream was “associated with fewer stretch marks during pregnancy.” Fewer. Which is good, but again, there’s no surefire method of absolute prevention. About 75 to 90% of women will get at least some marks during pregnancy, usually in the third trimester. I’ve heard that there seems to be some genetic connection, so if you’re wondering if you’ll be one of the lucky unmarked few, ask your mom if she got them. My mom had three mark-free pregnancies in her very early 20s and then got them when she was pregnant with me at 35. I figured I had a decent shot at avoiding them, but I broke out in the thin, white silvery kind all around my belly button right at 38 weeks. This time I don’t seem to be getting too many new marks yet, but my existing ones are much darker and more prominent. Eh. I freaked OUT last time at the sight of them, but now I know they really do fade with time and are barely noticeable to anyone other than me. They’re your battle scars, and you might as well get ready to wear them proudly.

Next up, the “mask of pregnancy” or chloasma, which usually crops up sometime during the second trimester. This involves brownish or yellowish patches of skin — it can show up anywhere, but is most commonly noticed on the upper cheeks and t-zone. Pregnancy hormones, for whatever reason, can stimulate extra melanin production in your skin and create a not-super-great blotchy look to your face. (Oral contraceptives can cause the same thing, incidentally.) While a lot of people seem to assume blondes and lighter-complexioned women are more prone to chloasma, it’s actually more common for brunettes and darker-skinned women. Like stretch marks, there’s nothing you can do to 100% for-sure prevent it from happening, although limiting your exposure to UVA and UVB light and wearing a broad spectrum sunblock on your face can really help.

And then there’s the linea nigra, that weird dark line that runs either up or down or right on through your belly button. Apparently we’ve all got that line already — it’s called the linea alba and is usually the color of your skin or even a little lighter. But since a LOT of skin-related stuff tends to get darker during pregnancy (like moles, freckles, areolas, genitals), this line appears more visible from about the second trimester on. And the darker your complexion, the darker the line. Usually. (Mine was barely noticeable last time and is completely invisible so far, but my fair-skinned sister had a pretty prominent one.) The line will eventually lighten a few months after you deliver, while other dark spots like moles and areolas and such, are probably going to be like that for good.

Zits! Pimples! Breakouts! Acne! Some women get them on their face, some on their body, others get bona-fide eruptions unlike anything you’ve seen this side of junior high. It’s a downside of the “pregnancy glow,” which is really just increased blood flow to your cheeks and extra secretions by your oil glands. Bleh! I know! Go with a very gentle face cleanser or oatmeal scrub and wash the afflicted areas at least twice a day. Make sure all your makeup is oil-free, but stay away from harsh astringents or cheap oil-fighting products. They’ll just make your glands overcompensate and produce more oil. The good news is that this is NOT a sign that you’ll be stuck in permanent pizza-face mode forever — most pregnancy acne is just that, and your skin WILL return to normal soon after birth.

And let’s not forget all the other weird, weird things that your skin might do during pregnancy. There’s heat rash, chafing and all-over itching from where your skin stretches. There’s plaques of pregnancy or PUPP, which is a raised and red pimply eruption of itchy skin on the abdomen or thighs or buttocks. It’s alarming looking but harmless, and will go away after delivery. Keep it moisturized and apply an anti-itch cream if it drives you crazy. There’s skin tags. Red palms. Tiny red raised freckles on your torso and extremities. Spider veins. Burst blood vessels on your face (and eyeballs!). And probably dozens of other strange lesions and bumps and marks that nobody ever talks about.

A visit to the dermatologist can really put your mind at ease if you notice anything really unusual — while mole growth and new moles are very normal, pregnancy is NOT immunity against skin cancer, so don’t hesitate to call and get checked out. Your doctor will probably shrug and tell you that will probably go away after delivery and in the meantime just , but it’s better to be safe than sorry, of course.

Oh Yeah, THIS: The STATE I manage to work myself into while trying to determine if I am, in fact, experiencing “decreased fetal movement” or if the kid is just taking a nap.

New This Time Around: While we’re on the subject of skin changes, let me tell you about my backne. And chestne. Shoulderne. Neckne. Yuck yuck yuck. So far no brand of body wash or bar soap seems to have any effect on it.

Related post: Pregnancy and COVID-19: What We Know (& a Few Things We Don’t)


Here’s a complete online version of our Ultimate Baby Registry Checklist and here’s the downloadable & printable version of our Baby Registry Checklist in case you’re going to the store or want to save it for later or share it.


If you’re considering an online baby registry, we recommend our affiliate Amazon’s Baby Registry, which offers free 90-day returns on baby store purchases. You can even add items from other websites onto to your baby registry.

Amazon Baby Registry 1

About the Author

Amy Corbett Storch


Amalah is a pseudonym of Amy Corbett Storch. She is the author of the Advice Smackdown and Bounce Back. You can follow Amy’s daily mothering ...

Amalah is a pseudonym of Amy Corbett Storch. She is the author of the Advice Smackdown and Bounce Back. You can follow Amy’s daily mothering adventures at Amalah. Also, it’s pronounced AIM-ah-lah.

If there is a question you would like answered on the Advice Smackdown, please submit it to [email protected].

Amy also documented her second pregnancy (with Ezra) in our wildly popular Weekly Pregnancy Calendar, Zero to Forty.

Amy is mother to rising first-grader Noah, preschooler Ezra, and toddler Ike.

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About the Author

Our Pregnancy Calendar, Zero to Forty, was written by Amy Corbett Storch while she was pregnant with her second son, Ezra.

Amy, also known as Amalah, writes the Advice Smackdown and Bounce Back here at Alpha Mom. You can follow her daily mothering adventures at her own site, Amalah.

About the Illustrations

The Zero to Forty illustrations were created by the artist Brenda Ponnay, aka Secret Agent Josephine. Brenda is very talented and these images are copyright-protected. You should hire her if you want your own unique ones.