Your Changing Body at Week 1
You might be eager to find out if you have a little one on the way!
Pregnancy tests
Your home pregnancy test measures a hormone called hCG (human chorionic gonadotropin) that your body produces after a fertilised egg attaches to the wall of your uterus, usually six to 12 days after fertilisation. Most pregnancy tests recommend waiting to test until at least the first day of your missed period.
Remember, the longer you wait after you have missed your period, the more accurate the test will be. Testing too early could result in a false-negative reading of a still-developing pregnancy.
What’s the best time to test?
Early in the morning when you urinate for the first time.
The hCG hormone is at its highest level at this time. This is the same hormone your doctor will check to confirm that you’re pregnant. These hCG hormone levels double every two to three days throughout your first 10 weeks of pregnancy. Your doctor might choose to check these levels in a series of tests to confirm how your early pregnancy is progressing.
If you test negative, but you notice other pregnancy symptoms, wait a few days and test again.
How accurate are home pregnancy tests?
Most tests can diagnose 90% of pregnancies on the first day of the missed period. One week later, the tests jump to 97% accuracy.
Fourteen days after conception, you’re officially in pregnancy week 4. In addition to the hormones, there’s a lot going on with your body:
- Your uterus begins to thicken and line with blood vessels to nourish your growing baby.
- The opening in your uterus where your baby ultimately will emerge, or your cervix, probably begins to soften and change colour. Your doctor may check for this to confirm your pregnancy at your first appointment.
- Tender breasts are often one of the first changes that signal that you have a baby on the way. This tenderness usually goes away after the first few months. Your breasts might seem heavier or full.
- Emotionally, you might both be thrilled and worried — or both, all at once. The emotions are different for each woman, but it is common to experience a full range of them.
- You might also notice a few of the other signs of early pregnancy before you even take your pregnancy test.
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