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Is bilateral kidney swelling and short fetal length a concern?

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Patient's Query

Hello doctor,

My baby is having bilateral swelling in the kidney and currently, I am 32 weeks pregnant but FL (fetal length) is showing up at 30 weeks.

Please help.

Thank you.

Answered by Dr. Georges Hany Kozah

Education:

MD

Professional Bio:

Dr. Georges Hany Kozah is an experienced Lebanese Gynecologist with an MD from The Lebanese University Faculty of Medical Sciences (2016) and a Fellowship completed in 2022. Specializing in high-risk obstetrics, advanced ultrasound, oncology, colposcopy, and hysteroscopy, he combines expertise with a patient-centered approach. Passionate about women’s health, Dr. Kozah strives for excellence and optimal outcomes in collaborative, innovative care.

This doctor is not available for online consultations on the platform anymore.

Hi,

Welcome to icliniq.com.

I have gone through your query and understand your concern.

Bilateral kidney swelling in baby (prenatal hydronephrosis):

Since your baby has bilateral swelling in the kidneys at 32 weeks, this could mean hydronephrosis, which happens when urine is not draining properly. It is relatively common; in many cases, it resolves independently after birth.

What to do next?

  1. Follow-up ultrasounds: Your doctor will likely monitor the kidney swelling through regular ultrasounds to check if it worsens.

  2. Assess amniotic fluid levels: If your amniotic fluid levels are normal, the baby’s kidneys still function well.

  3. Post-birth plan: After birth, the baby may need a renal ultrasound and possibly antibiotics to prevent infection if the swelling persists.

Fetal length (FL) measuring behind at 30 weeks:

Since your baby's femur length (FL) is lagging by 2 weeks, it might indicate:

  1. Normal genetic variation (some babies just have shorter legs).

  2. Mild growth restriction (your doctor will check other growth parameters like head and abdominal circumference).

Should you be worried?

  1. If the overall fetal growth is normal, and only the FL is behind, it might just be a genetic trait.

  2. If other measurements (like head and abdomen) are also behind, your doctor may check for placental insufficiency or growth restriction.

  3. Doppler scans can help assess blood flow to the baby to ensure proper growth.

Next steps:

  1. Keep up with regular ultrasounds and discuss results with your doctor.

  2. Monitor fetal movements—if you notice decreased movement, seek medical attention immediately.

  3. Stay hydrated and eat a nutritious diet to support the baby’s growth.

I hope I have answered your question.

Let me know if I can assist you further.

Thank you.

Medically reviewed by iCliniq medical review team
Published At March 28, 2025
Reviewed At April 1, 2025

Education:

MD

Professional Bio:

Dr. Georges Hany Kozah is an experienced Lebanese Gynecologist with an MD from The Lebanese University Faculty of Medical Sciences (2016) and a Fellowship completed in 2022. Specializing in high-risk obstetrics, advanced ultrasound, oncology, colposcopy, and hysteroscopy, he combines expertise with a patient-centered approach. Passionate about women’s health, Dr. Kozah strives for excellence and optimal outcomes in collaborative, innovative care.

This doctor is not available for online consultations on the platform anymore.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Education:

MD

Professional Bio:

Dr. Georges Hany Kozah is an experienced Lebanese Gynecologist with an MD from The Lebanese University Faculty of Medical Sciences (2016) and a Fellowship completed in 2022. Specializing in high-risk obstetrics, advanced ultrasound, oncology, colposcopy, and hysteroscopy, he combines expertise with a patient-centered approach. Passionate about women’s health, Dr. Kozah strives for excellence and optimal outcomes in collaborative, innovative care.

This doctor is not available for online consultations on the platform anymore.

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