1 Week Pregnant: The Egg's Story That Began Before You Did

Before the positive test. Before the missed period. Before you even suspected anything had changed, there was already a story unfolding inside your body.

It is the egg's story. And it begins long before you did.

Most women find out they are pregnant somewhere around week four, five or six. And almost every single one of them does the same thing. They scroll back. They want to know what was happening in the weeks before they knew. They want the whole story, right from the very beginning.

So here it is. And I promise you, it is more extraordinary than anyone ever told you.

The egg that became your baby has been inside you your whole life

I want to start with the fact that genuinely stopped me in my tracks the first time I heard it.

The egg that became your baby was not made this month. Not last year. Not even when you were a teenager. That egg was formed while you were still curled up, growing, inside your own mother.

Think about the scale of that for a second. Before you were even born, your tiny developing body made around six to seven million eggs. By the day you arrived in the world, most were already gone, leaving one or two million. By the time you reached puberty, only a few hundred thousand remained. And across your whole life, only about four hundred of them will ever be released.

One of those four hundred became your baby.

And it has been inside you the entire time. Through your childhood and your first day of school, your first heartbreak, every ordinary Tuesday you cannot even remember, it was there, tucked away, waiting. Long before you knew its name, long before you knew you wanted it, it was already yours.

And here is the part that made me well up

Because your own eggs were formed while you were still a tiny fetus inside your mother, the egg that became your baby was there too. Already inside you, while you yourself were curled up inside her.

Let that settle for a moment. The very first speck of your baby once rested inside your mother, your baby's grandmother, years before you were grown, before you had met your partner, before you had the faintest idea any of this was coming.

And the same is true of you. You began as a single egg inside your mother while she was still a fetus inside her own mother. So a part of you was once held inside your grandmother. Three generations, each one nested inside the one before, like a set of Russian dolls reaching back through time. I still find that almost too much to hold, and far too beautiful to want to put down.

So if all that already happened, why am I only 1 week pregnant?

Here is the part that surprises almost everyone. Week one of pregnancy is actually the first week of your last period.

It sounds backwards, and it is. Your pregnancy is counted from the first day of your last period, not from the day you conceived. That is simply because the start of your period is a date you can actually know. The exact moment of conception is not.

So it means the first two weeks of a pregnancy happen before there is even a baby. In week one, you are having your period. Behind the scenes, your body is quietly getting a group of eggs ready, and one of them will go on to become the star of this whole story.

You will not feel pregnant, because you are not yet. And that is exactly right.

Is it normal to feel absolutely nothing this week?

Completely. In fact, feeling nothing is exactly how it should be.

There are no pregnancy symptoms in week one, because there is no pregnancy yet. The tiredness, the queasiness, the tender breasts, all of that comes later, once your hormones start to rise. Right now there is nothing to feel, and that is not a sign that something is missing. It is a sign that everything is going to plan.

If you found out at week five or six and you are reading this looking backwards, you did not miss a thing. There was nothing to notice. The most extraordinary part of the story was unfolding completely out of sight.

From Courtney. I keep coming back to one fact, and it gets me every single time. The egg that became each of my four children was already inside me when I was a tiny baby myself, long before I had any idea I would ever be their mother. So in some quiet, cellular way, they were a part of me my whole life, just waiting for their moment. Whatever brought you to this page, whether this baby was longed for or a complete surprise, you have been carrying the very beginning of them for far longer than you ever knew. That is worth sitting with for a moment.

The one thing to do this week

Start taking folate today. If you do nothing else this week, do this. It is the one piece of pregnancy advice every major health authority in the world agrees on.

Here is why it cannot wait. Folate builds your baby's brain and spine, and that work begins in the very first weeks. Often before you even know you are pregnant.

Now for a little secret most women are never told.

Not all folate is the same.

Your prenatal vitamin will have one of two kinds. The old kind is folic acid. The newer kind is methylated folate. On the label it might say methylfolate or 5-MTHF.

The difference is simple.

Folic acid is the kind your body has to switch on before it can use it. Methylated folate comes already switched on, ready to go.

And a lot of women are just a bit slower at switching the old kind on. It comes down to a common gene called MTHFR, and it is nothing to worry about.

So methylated folate is the easy win. Your body can use it straight away.

That is the one I would look for. Check your label, or ask your pharmacist to point you to a prenatal with methylated folate. Any good one has the amount you need.

Already have a folic acid prenatal? Please do not stress. It still works, and millions of healthy babies have been built on it. Just something to look for next time you buy.

That is it. Folate is your only homework this week.

Coming up in week two

Next week, your body reaches the big moment. The egg that has waited your whole life is finally released, and the most extraordinary race in nature begins. Millions of cells, one tiny target, and a single winner.

And right at the moment two become one, something happens that scientists only managed to capture in a human egg for the first time in 2016. When I read what it was, it genuinely took my breath away.

I will see you in week two.

Written by Courtney Garland, NICU nurse, lactation consultant and mother of four, and founder of The Mama Years. This is here to inform and reassure you. It is not a substitute for medical advice, so always follow the guidance of your own doctor or midwife.

The Mama Years. 2026.

References

American College of Obstetricians and Gynecologists. (2025). Anticipatory counseling regarding ovarian-factor fertility decline. https://www.acog.org/clinical/clinical-guidance/committee-statement/articles/2025/11/anticipatory-counseling-regarding-ovarian-factor-fertility-decline

Centers for Disease Control and Prevention. (2025). MTHFR gene variant and folic acid. https://www.cdc.gov/folic-acid/data-research/mthfr/index.html

Mayo Clinic. (2025). Fetal development: The first trimester. https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/prenatal-care/art-20045302

World Health Organization. (2015). Guideline: Optimal serum and red blood cell folate concentrations in women of reproductive age for prevention of neural tube defects. World Health Organization. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5779552/

The Mama Years is written by Courtney Garland, a NICU registered nurse and IBCLC lactation consultant, against the research. When the science is genuinely unsettled, she says so instead of guessing. Nothing here replaces the advice of the clinician looking after you.