If you’re reading this, you probably already have a positive test or a pretty strong suspicion that you’re pregnant. Now you’re trying to figure out how far along you actually are. Maybe you’re weighing your options and need to know your timeline. 

Maybe you’re just trying to wrap your head around what’s happening in your body or you aren’t sure if you are ready to be pregnant or have a baby yet. You may be confused, scared, and feeling alone. Don’t worry, because you don’t have to go through this alone and we are here to help guide you through it so that you make the best decision for you and the baby. 

Either way, understanding how pregnancy weeks work is one of the most useful things you can do right now.

Here’s the thing about pregnancy dating: it can be confusing, because doctors count pregnancy differently than most people expect.

How Pregnancy Weeks Are Actually Counted

Most people assume pregnancy is counted from the day of conception. It isn’t. Doctors count pregnancy from the first day of your last menstrual period, often called your LMP. 

That means by the time you actually conceive, you’re already considered about two weeks pregnant. And by the time you miss a period and get a positive test, you’re usually already four to six weeks along.

So if your last period started on January 1st and you find out you’re pregnant on February 15th, you’re roughly six and a half weeks pregnant, not six weeks from when you had sex.

This matters a lot, especially in Mississippi, where timing affects every option you have.

The Trimesters

Pregnancy is divided into trimesters. The first trimester runs from weeks 1 through 13. The second trimester covers weeks 14 through 27. The third trimester takes you from week 28 to delivery, usually around week 40.

Most early symptoms and most early decisions happen in that first trimester window.

Why Knowing Your Exact Weeks Matters

If you’re considering your options, including abortion or abortion pills, how far along you are is the single most important factor in what’s available to you and what’s safe. Mississippi law places strict limits on abortion access, and even in states where abortion is more accessible, medical guidelines limit certain procedures based on how far along you are. The abortion pill, for example, is only approved by the FDA through 10 weeks of gestation.

Beyond that, accurate dating matters for medical reasons that apply no matter what you decide to do.

An ultrasound can confirm whether the pregnancy is viable. A significant percentage of early pregnancies end in miscarriage, and sometimes a positive test reflects a pregnancy that isn’t progressing. If you’re going to make decisions about this pregnancy, you want to know if it’s actually developing.

An ultrasound can also rule out an ectopic pregnancy. This is a pregnancy that implants outside the uterus, usually in a fallopian tube. Ectopic pregnancies can’t be carried to term, and they can’t be ended safely with the abortion pill. 

They require specific medical treatment, often surgery. Taking abortion medication with an undiagnosed ectopic pregnancy can be life-threatening because the pill won’t end it, and the pregnancy can continue growing until it ruptures the fallopian tube. This is one of the main reasons medical professionals strongly recommend ultrasound confirmation before any abortion decision.

Home Calculations vs. Medical Confirmation

You can do a rough calculation yourself. Count back to the first day of your last period, then count forward in weeks. Online pregnancy calculators do the same math.

But this assumes your cycle is regular and that you remember your last period accurately. Plenty of women have irregular cycles, spotting that they mistake for a period, or just aren’t sure of the exact date. A home calculation can be off by a week or more, and in early pregnancy, that’s enough to change what options are on the table.

An ultrasound gives you the real answer. In the first trimester, dating ultrasounds are usually accurate within a few days.

What Your Gestational Age Might Mean for You

Here’s a quick overview of where most women find themselves when they first confirm a pregnancy:

4 to 6 weeks: Very early. You may have just missed your period or be only a few days late. At this stage, an ultrasound might not yet show a heartbeat, and you may be asked to come back in a week or two for a follow-up scan.

6 to 10 weeks: The most common window for pregnancy confirmation. An ultrasound at this stage can usually confirm viability, detect a heartbeat, and give you an accurate gestational age.

10 to 13 weeks: Still first trimester. Your options begin to narrow at this point for certain types of abortion care, but you have clearer information about the pregnancy itself.

Past 13 weeks: You’re in the second trimester. The medical picture changes, and so do your options.

Unsure if you want to keep your pregnancy? Get your ultrasound in Hattiesburg, MS, first, and then let’s discuss your options.

At Hope Clinic in Hattiesburg, we offer free ultrasounds to confirm pregnancy and determine how far along you are. There’s no cost, no insurance required, and no judgment about what you’re thinking or what you decide to do with the information.

The appointment is confidential. 

You’ll meet with someone who can walk you through what the ultrasound shows and give you accurate medical information about where you are in your pregnancy. What you do with that information is your call.

If you’re trying to figure out how far along you are, the fastest and most accurate way to know is to come in. Call or text us to set up a confidential appointment, usually available within a day or two.

You deserve real answers before you make any big decision. We’re here to help you get them.