Is an ALT level of 45 U/L considered serious during pregnancy?

Question

Hi doctor,

I am currently 26 weeks pregnant and feeling very anxious about something. Three weeks ago, at around 23 weeks pregnant, I was admitted to the hospital overnight for a headache. My MRI was clear, and my urine and blood pressure were also normal.

Few blood tests were done, but no doctor or midwife ever discussed the results with me. I was discharged the next day, and later saw the blood results myself. No one mentioned anything to me directly.

One of the results showed my ALT was 45 U/L, which was marked as out of range. No one told me this. I later spoke with a doctor who said that during pregnancy, the ALT reference range increases up to 70 U/L, and that my result is therefore normal. I am seeking confirmation if this is true.

Does an ALT of 45 U/L mean anything serious, like fatty liver?
Will it return to normal?
How could this have happened? I was slightly dehydrated and had a headache at the time of the test.
Before pregnancy, my ALT was 19 U/L. The only other time it was slightly raised (ALT 49 U/L) was two months after a miscarriage.

I had a normal FibroScan a few months back. I eat a healthy diet and have no underlying medical conditions or medications. No follow-up was mentioned by the hospital. And no repeat blood test was advised.

So now I am left wondering:

Is this serious?
Could this harm me or my baby?
Did the doctors miss something?

Please guide.

Answer 1

Hi,

Welcome to icliniq.com.

I read your query and understand your concern.

I can understand how much this worries you, and it is understandable to feel unsettled when results are not explained clearly.

An alanine transaminase (ALT) of 45 U/L is only mildly raised. In pregnancy, the normal liver function ranges do not usually change much, but small fluctuations can happen for many reasons, including mild dehydration, recent illness, or even the way the blood is handled.

A result in the 40s is not typically concerning, especially with a normal fibroscan earlier this year and no other abnormalities on your bloods, urine, or blood pressure.

This does not point to fatty liver or serious liver disease, and it would not harm your baby at this level. If doctors discharged you, it means they reviewed your results and felt there was no cause for urgent follow-up. Hospitals do not ignore abnormal results; they are checked by the team before you go home.

If you are still anxious, you can ask your doctor for a repeat liver test for reassurance. For now, nothing here suggests danger to you or your baby.

I hope this answers your query. Feel free to reach out anytime.

Thank you.

Answer 2

Hi,

Welcome back to icliniq.com.

I read your query and understand your concern.

I am glad you are feeling more reassured. Mild itching can be very common in pregnancy, especially as the skin stretches and becomes more sensitive. It often affects the belly, breasts, or thighs and does not usually signal anything serious.

That said, you are right that we always look for intrahepatic cholestasis of pregnancy (ICP). The typical feature of ICP is itching, which is more intense at night, often on the palms of the hands and soles of the feet, and usually without a rash.

If that is the kind of itching you are noticing, mention it to your doctor so they can check your bile acids and repeat liver function tests.

With your mildly raised ALT earlier, it is worth having this ruled out for peace of mind, though most itching in pregnancy is not due to ICP. For now, keep your skin moisturized and stay hydrated.

I hope this answers your query. Feel free to reach out anytime.

Thank you.