Your Pregnancy at Weeks 1-3

by Your Baby Club

Pregnancy is tracked from the first day of your last period, meaning there isn’t actually any sign of baby until week 3. 

Week 1 is when your body is starting its new menstrual cycle, with day 1 being the first day of your period. Your typical period will last between 7 and 8 days.


This is shortly followed by your Luteal phase, during which your uterine lining will thicken, your ovarian follicles will mature and an egg (or two!) will be released. This happens around day 14-18 of your cycle (week 2), depending on your usual cycle length. Once your egg is released, it makes its way down the fallopian tube in search of fresh sperm to envelop.

Week 3 is when the magic happens! Your egg is making its way down the fallopian tubes and has found a viable sperm, allowed it to penetrate into its core in order to fertilise. Once fertilised, it becomes what’s called a zygote. 


This once single cell begins to multiply at an astonishing rate, transforming into a little ball of cells called a blastocyst. It continues to make its way down the fallopian tubes into the uterus, where it will spend the next 8 and a half months growing into an adorable little baby!

If you’ve not been taking preconception vitamins, it’s time to stock up on folic acid as the next few weeks are the most crucial to baby’s development.

Click here to read what comes next in Week 4.


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Your Baby Club

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