If you are planning on taking a Medichecks test with us while pregnant, it is important to know that some biomarker readings can be affected depending on how far along you are in your pregnancy.
If you are unsure about whether a test is right for you, we recommend you contact your doctor before placing an order.
Please read the below article for biomarker changes in your first trimester.
For changes in your second trimester, click here.
For changes in your third trimester, click here.
First trimester (1-12 weeks)
In the first trimester of pregnancy, the following biomarkers will increase (compared to before you were pregnant):
- Beta-hCG (rises rapidly and peaks – if you took a home pregnancy test, this is the hormone that this test will have detected).
- Progesterone (to maintain a healthy uterine lining)
- Oestrogen (can stimulate placental development)
- Prolactin (in preparation for lactation, supporting breast tissue development)
- hs-CRP (mildly increases – there is a slight inflammatory response during pregnancy)
The following biomarkers will decrease:
- LH (decreases to low levels)
- FSH (decreases to low levels)
LH and FSH levels will stay low during the course of your pregnancy. These hormones support ovulation in your body, and therefore are not needed in high levels during pregnancy.
In addition, thyroid activity may increase slightly. You may also see changes in:
- Free T4/free thyroxine (slight increase)
- Free T3 (slight increase)
- TSH (decrease)
These changes are expected and normal. However, if you have any concerns about your blood test results, we recommend you seek medical advice for further guidance.
Will I get specific reference ranges for my test?
Our laboratories are unable to provide pregnancy-specific reference ranges. The reporting doctor will refer to some Perinatology reference ranges, or those from Gloucestershire University Hospital Trust.
If you purchased your test before you knew you were pregnant, you can still cancel your test within 30 days of purchase. Please contact our Customer Care Team if you need further help or information.
Please click here for information on taking our tests in your second trimester.
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