3 weeks pregnant

You’ve reached your most fertile time and your egg is waiting for a healthy sperm. You know what to do!

3 weeks pregnant

Your baby at 3 weeks

Fertilisation starts when sperm meets egg in the fallopian tube. It only takes a few hours for the fertilised cell (zygote) to divide and continue to divide(s). Within days, the miracle of life, takes the shape of a microscopic ball of cells (blastocyst). It’s about a fifth of the size of this full-stop.

Your body at 3 weeks

Some women experience light spotting, staining or bleeding five to ten days after conception. This is known as implantation bleeding and occurs when the fertilised egg (blastocyst) implants into your uterus wall. Not all women are aware of the exact moment of conception and many do not experience any bleeding.

There is no way anyone can tell you are pregnant but if you know your body well, you might recognise some early signs of pregnancy such as breast changes or lack of energy.

Pregnancy fact

The chromosome in dad’s sperm determines whether you are having a boy or girl at the very moment of conception.

How you’re feeling at 3 weeks

Confusingly, emotions are similar to premenstrual symptoms and may include mood swings, irritability and weepiness. Can your mindset help you conceive, find out about the benefits of a positive mental attitude when trying to get pregnant.

Secretly hoping for a little girl or a baby boy, find out what the ‘old wives’ say about how to conceive a boy or girl.

Pregnancy advice

It’s normal to feel anxious if you are waiting for the right time to do a pregnancy test. Remember, it’s normal for many couple to take up to 12 months to two years to get pregnant. For more information on getting pregnant see

2 weeks pregnant ← 3 weeks pregnant → 4 weeks pregnant

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