Pregnancy Test FAQs

We gathered the most common questions about Stix. Read on for the details!

How do pregnancy tests work, anyway?

As soon as you get pregnant, your body starts to produce a hormone called human chorionic gonadotropin (hCG) which is tested in a pregnancy test. Stix detects this hormone and displays the result after five minutes.

hormone tested in pregnancy test

Two lines means the test is positive and you are pregnant.

One red line in the control and one in the test window means you are likely pregnant. One line may be lighter than the other.

how soon can a pregnancy test determine your pregnant

One line in the control window means the pregnancy test is negative and you are not pregnant.

But I see a faint pregnant line in my result window. What does that mean?

Ah, the confusing faint line while home testing. We’ve been there. To keep it short, if you see a faint pregnant line you should wait a few days and test again.

The faint line can mean a few different things. Here’s how to decode and what to do:
Illustration of a faint line on the pregnancy test. You’re pregnant but it’s too early to confirm: A faint pregnant line may mean that your levels of hCG are just too low. The farther along you are in your pregnancy, the more hCG there is. And the more hCG in your urine, the easier it is for the test to detect. If you see a faint line, wait a few days and test again.

You’re not pregnant and it’s just an evaporation line: An evaporation line is a line that may appear in the results window as the urine dries, which may cause you to think you’re pregnant when you’re not. The main way to tell is that evaporation lines appear after the five minute wait time. To avoid this confusion, check right at the five minute mark.

You were pregnant but miscarried early: Early miscarriages (sometimes called a “chemical pregnancy”) are common. If you’ve had early pregnancy loss, there may still be traces of hCG in your urine even though you are no longer pregnant. To be sure, wait a few days and test again. If you still see a faint line on your home pregnancy test, schedule an appointment with your doctor.

When is the best time to take a pregnancy test ?

The day of your missed period. Your levels of the hormone hCG double in your urine every few days so the longer you wait to test, the stronger the results will be. 

What time of day should I take the test? Does it matter?

It’s best to test first thing in the morning, before you’ve had any water to drink. First morning pee contains a higher concentration of the hormone hCG, so if you’re testing early, first thing in the morning is best. Otherwise, any time of day is okay. Just don’t drink large amounts of fluids beforehand.

I don’t get my period every month. How do I know the right time to test?

We feel you. If you’re not sure when your cycle begins and ends, it’s best to wait 19 or more days after you’ve had sex. If you’re having sex regularly and you don’t get your period, a Stix pregnancy test subscription for every one, two, or three months is the best option for peace of mind and safety.

Are there any factors that can affect the result?

Please read our handy instructions included in the package. The only factors that can affect your results are if you’ve had a recent miscarriage, if you’re on fertility drugs, or if you're taking a drug that contains hCG. Ovarian cysts, ectopic pregnancy, menopause, and some very rare medical conditions can also give misleading results. Alcohol, birth control, and painkillers will not affect your results. In general, read instructions of any drugs you are taking.

I took the test and waited five minutes but I don't see any lines in the result window. What happened?

This is a very rare occurrence but don't fret, it can happen. First, check your Stix pregnancy test wrapper to make sure it's not past expiration date. If it's past the expiration date, the test may be defective. Heads up - we ship Stix with about two years of shelf life on them.

However, if it's within the expiration date window, there are a couple reasons for a blank result. Make sure your urine stream hits the absorbent tip (results window facing up) for a full five seconds and to wait the full five minutes for results. Please follow the instruction card carefully.

Always shoot us an email at if you have questions about this and we're happy to help :).

I’m pregnant. What’s next?

Hit up your doctor for an appointment to discuss next steps. They’ll take it from there.

My test says I’m not pregnant but I really think I am. What should I do?

If your first test says you aren’t pregnant, it’s best to wait three to five days and test again. If you’re pregnant, hCG doubles in your urine every few days. It takes the average American woman six months to conceive, so a Stix subscription can provide peace of mind for your wallet and nerves.

Do pregnancy tests expire?

If you're wondering how long Stix pregnancy tests last, pregnancy tests do have an expiration date. The good news is, they won't expire for at least one to two years after your Stix delivery arrives. The specific expiration date is clearly printed on the back of the packaging label.

How often should I take pregnancy tests?

It depends on your situation. If you're not trying to get pregnant and have super regular periods, you can order on a one off basis. If you experience irregular periods or you're trying to conceive, then you should be testing more regularly. We designed Stix to fit into your lifestyle with ease and convenience. Find out if a Stix subscription is right for you below.

How sensitive are your pregnancy tests?

Stix can detect hCG at 20mIU/hCG, or about 7 to 10 days after ovulation. For the best results though, we do recommend taking the test at least three days before your missed period or 19 days after you had sex. Your levels of hCG increase every single day so the longer you wait to test, the stronger the results will be. If you do decide to test early, definitely do it first thing in the morning, before drinking any water.

How fast does the delivery come? 

Our shipping is fast and free! We ship out orders every single day (in discreet envelopes that fit through a mail slot). Depending on where you live, your order may take anywhere from 2-5 days to arrive. If you're in a rush, you can choose expedited or even overnight shipping during checkout.

Is Stix FSA/HSA eligible?

Yes, of course. Just check out like normal, either with your FSA card or any payment method to submit an HSA claim,

Ovulation Test FAQs

How do ovulation tests work, anyway?

This test measures for high levels of LH (luteinizing hormone) in your pee. LH surges 24-48 hours before you ovulate. When you ovulate, your ovaries release an egg. When that egg pairs up with a sperm cell after sex, you can get pregnant. You’re the most fertile on the day of the LH surge and the day after.

How do I take an ovulation test?

Just like pregnancy tests, you pee on a stick to learn what is happening in your body. It’s suggested to take a test a day until you get a positive result. You should start taking them many days before the expected ovulation to be sure you don’t miss it. Ovulation is tricky to detect, so you want to be sure you catch it while it’s happening. After you take the test, it’s usually recommended to check the results no later than 10 minutes to avoid a false-positive. If the result is positive, you’re likely to ovulate within 12-36 hours from when you take the test. If you’re trying for a baby, this is your time to get going!

I took the test—How do I know if I’m ovulating?

Like a pregnancy test, each ovulation test has two windows. One window will show a line indicating that the test is working properly. This is known as the control line. The second window will tell you if your LH levels are high and you are likely to ovulate soon, this is known as the test window. If the line in the test window is as dark or darker than the control line, it means your LH is surging and ovulation is coming around the corner. Refer to the instructions in your package to learn how to read your test.


If only control line appears or the test line is lighter than the control line, the test result is negative which means that no LH surge is detected.


If both test line and control line are visible and the test line is darker than or equal to the control line, the test result is positive, which means ovulation will likely happen in the next 24-48 hours.


If there is no distinct pink-purple colored line visible both in the TEST area and CONTROL area the test is invalid. We recommend retaking the test now.

So, when do I take the test?

Think of your usual cycle length, AKA the number of days from the first day of your last period to the start of your next period (period tracking apps are a great way to get this info). Based on this number, refer to the chart in your instruction packet to determine your best day to test. For example, if your cycle is usually 28 days and the first day of your last period started on the 7th, you should start testing on the 18th.

Can an ovulation test show a negative even if I'm ovulating?

Along with pregnancy tests, it is possible to get a negative result on your ovulation test when you are in fact nearing your ovulation date. One thing you can do to avoid getting a false-negative test result is to be sure you are testing early or late enough in your cycle. We like to test every day in the morning starting 10 days after our cycle starts.

It’s important to remember that ovulation tests detect the LH hormone, not ovulation itself, and there is only a certain amount of time that the surge will show up in your urine. Think of the LH surge as a warning that you’re about to ovulate. If you don’t catch the surge while it’s happening, your test results will be negative and you will think you’re not ovulating when you actually are.  

Do ovulation tests expire?

There is an expiration date on the back of each ovulation test wrapper. Don't worry -- the expiration date is a few years out from the day you receive your test!

Does my hormonal birth control affect my ovulation?

Hormonal birth control can have a mix of two hormones, estrogen and progestin, or only have one, progestin. These hormones are the key orchestrators of your menstrual cycle, thus they influence your ovulation as a result of taking hormonal birth control. Estrogen and progestin combined birth control suppress your natural estrogen and progestin hormones, thus no ovulation occurs, meaning your ovaries do not release an egg. Ovulation is still likely to occur with progestin-only options. Read our article for more information on how hormonal birth control affects your ovulation.

How fast does the ovulation test delivery come?

Our shipping is fast and free! We ship out orders every single day (in discreet envelopes that fit through a mail slot). Depending on where you live, your order may take anywhere from 2-5 days to arrive. If you're in a rush, you can choose expedited or even overnight shipping during checkout.

Is Stix FSA/HSA eligible?

Yes, of course. Just check out like normal, either with your FSA card or any payment method to submit an HSA claim,