Fertility

All You Need to Know About 21 DPO

Team Peanutabout 2 months ago4 min read

So it’s been three weeks since you ovulated. Maybe you’ve been able to keep yourself busy, or maybe every day has felt like a month.

21 DPO

Whatever your experience of the TWW, you’re bound to be running out of patience if you’re at 21 DPO and still waiting for your BFP.

It’s a lot of acronyms, right? Don’t worry. You can find a refresher on the language of trying to conceive here.

And now let’s dive into what’s happening at 21 DPO.

In this article 📝

  • What to expect at 21 DPO?
  • Can you get a positive pregnancy test at 21 DPO?
  • 21 DPO symptoms
  • 21 DPO with a BFN

What to expect at 21 DPO?

If you’re pregnant and measuring from the first day of your last period, you’ve reached five weeks today.

To break this down, that’s two weeks of the follicular phase of your cycle, two weeks of the luteal phase after ovulation, and then one week after your period should have arrived.

Can you get a positive pregnancy test at 21 DPO?

Even if you’ve been waiting until you’re definitely late to take a pregnancy test, you can probably give it a go at 21 DPO.

Blood tests at the doctor’s office are the most accurate, but home pregnancy tests can also detect the pregnancy hormone (that’s hCG or human chorionic gonadotropin) in your pee as early as four or five days before you miss your period.

They generally need a level of about 20mIU/ml of hCG to turn positive.

Your hCG at 21 DPO might be as high as 324-4130mIU/ml.

At what DPO is the average BFP?

We can’t accurately say which DPO most women get their BFP, not least because it’s tricky to pinpoint exactly when ovulation happens.

Some tracking sites suggest the average is around 13-14 DPO, but there are always outliers.

Some women test as early as 9 DPO and get their BFP, some get false negatives a week after their period is due.

21 DPO symptoms

For some mamas-to-be, unmistakable pregnancy symptoms kick in soon after implantation as their hCG starts to rise.

But some don’t feel anything until their sixth week, and others seem to sail through pregnancy feeling pretty much the same as they did before.

Here are some signs to watch out for:

  • Frequent bathroom breaks – Your hormones are sending extra blood to your kidneys, so you’re peeing more often.
  • Nausea and vomiting – Whoever called pregnancy nausea “morning sickness” obviously never experienced it, because it can strike at any time of day.
  • Cravings and aversions – We can laugh about craving ketchup on ice cream at 2 am, but the other side of the coin is food aversions, where the sight, smell, or texture of certain foods can be difficult to, well, swallow.

21 DPO with a BFN

What if you’ve been testing and you’re disappointed again by a 21 DPO BFN?

BFNs can be frustrating, even heartbreaking, but there is still hope.

It could be that you ovulated later this month, or that the fertilized egg implanted later than average, which means your hCG levels might still be too low to detect.

Make sure that you’re following all the instructions on the test, and keep testing every few days.

If you’re having what seem like pregnancy symptoms with no BFP, you might want to book an appointment with your doctor for a chat and a blood test.

You don’t just have to wait this out.

Sadly, it’s also possible to experience what used to be known as a false positive or a chemical pregnancy.

We prefer to call this early pregnancy loss.

In these cases, you were pregnant, the HPT was sensitive enough to pick up a low level of hCG, and then you had a very early miscarriage.

This news can be very difficult to process, so know that you’re not alone.

The Peanut community is there through all the ups and downs of TTC and early pregnancy.

Read next: All You Need to Know About 22 DPO